Ha, maybe! I don’t remember if I ever saw a 180 flip. This is the closest I could find from a quick search: https://www.youtube.com/watch?v=zZpIglVnYuY

If you have a video with the 180 degree flip I would really like to see it. This context seems like a plausible place to see such a move in modern days. I would imagine that in some martial arts this effect would be well known.

Some of these ‘games’ do trigger real physiological mechanisms. A well-documented example is the Valsalva maneuver, where forcefully exhaling against a closed mouth and nose affects heart rate and blood pressure.

In some games, this maneuver (or similar) is combined with a second action that normally increases blood flow demand to the brain. The mismatch between reduced blood pressure and sudden demand can cause dizziness or brief loss of consciousness due to insufficient oxygen reaching the brain.

Actually, there is a similar effect sometimes seen during heavy deadlifts, suddenly releasing can sometimes make people pass out. There are many “deadlift passing out” videos online.

So, those ‘games’ can work. I have known of kids breaking their teeth after face-planting against the floor while playing those games. Not a very smart thing to do.

If you catch a frog in between your hands and quickly flip it around, you can get the frog into a kind of paralyzed state called ‘tonic immobility’.

Here is a photo from Wikipedia:

OK, well, many years ago I was very interested in this phenomenon and decided to look into the literature.

I found a paper from 1928 titled “On The Mechanism of Tonic Immobility in Vertebrates” written by Hudson Hoagland (PDF link).

In this paper, the author describes contraptions he used to analyze the small movement (or lack of movement) in animals while in this state. They look kind of like torture devices:

OK, but, that’s still not it… The obscure fact is found in the first footnote of that paper, on page #2:

Apparently this or a similar effect can be observed in humans too?! In this paper, the author himself claims to have done this and that it works! I tried to locate more recent resources describing this phenomenon in humans but I could not find them… Is this actually possible? If so, why is this not better documented? Or, maybe it is better documented but understood as a different type of reflex today? Not sure.

That’s a very interesting resource!

Actually, the countries where I have been able to purchase anonymous SIM cards are in the list “As of 2021, the following countries do not have mandatory SIM card registration laws”. So, it appears like I just happen to have been lucky and I should not make this as such a general recommendation…

Funny, about Mexico it says:

Countries expected to implement mandatory SIM registration in 2022: Philippines, Mexico.

I can at least confirm that I was not asked for ID when buying SIM cards last year in Mexico.

I just looked it up and found the proposed law for Mexico on Wikipedia. It was struck down in 2022 as unconstitutional.

So, then, I really have no anecdotes to say that it is easy in places where it is formally illegal.

I am not sure about France. When I search online, I often find resources stating “Yes, ID is required”, even for the countries where I know that I have bought SIM cards with cash. Well, the SIM is usually free and what I pay for is the top-up code.

I would imagine (but I’m not sure) that if you try to buy a SIM card at an airport or at an official store from a large telephony provider you are more likely to get asked for an ID. I find them in shops that have signs with the names of smaller MVNOs. Something like what is shown in this image that I found online, where you can see signs of ‘Lyca Mobile’ and ‘Lebara’:

But, your mileage may vary. Probably some locations are more strict than others.

Depending on where you are travelling to and from, you can often get an anonymous prepaid SIM card. That is what I do: buy one with cash, put it into a MiFi router, and only switch it on when I need internet. That way I stay off the records of whoever else is with me and I am not relying on their identity as a shield. I have not found an eSIM provider that gives me the same level of anonymity, so I have avoided those.

If you really have to register a SIM with your identity, it depends on the situation. For example, if you buy a SIM in the EU, activate roaming, and then use it in Mexico, the Mexican authorities can’t instantly demand your subscriber info from the EU. On the other hand, if you or your family buy local SIMs while showing ID, then travel together and check in to hotels together, it makes little difference whose SIM is whose. For Mexico specifically, you can walk into an OXXO store, pay cash, and get a prepaid SIM with a data package, no ID required. Many countries have similar cash options so you check ahead of time.

About whether the worry is justified. The type of surveillance you mention, such as stingrays, requires both strong capability and strong motivation. If a government wanted to, they could stop your entire family at the border before you ever left. But from what you describe, you are just a foreigner who might pass by a protest. That is unlikely to trigger the level of targeting you are thinking of.

Still, I would not call it “in vain.” Building habits that protect privacy and understanding how information flows is always useful. But if you can get a prepaid SIM anonymously with cash, it is usually a cleaner option than tethering from family.

Yeah, I get that. I think that this camera + lens combination would meet your criteria while giving you pretty decent quality and the ability to upgrade. It is what I have recommended in the past to people asking this same question and they have been very happy with it. You can pass the idea through Grok, I think it will agree ;)

Instead of a “compact camera”, I’d recommend getting a used Lumix DMC-GX80 + the 20 mm pancake prime lens. If you don’t like primes and prefer to zoom, you can get a compact zoom lens instead.

Some people really don’t like buying used camera equipment… but I have had only positive experiences so far.

I like the idea of PeerTube, but I tried running an instance and was unable to sustain the experiment for too long. I made it very open and it got quickly flooded by pirated TV series and spammy and heavy content.

After that, I had a difficult time at some point finding an instance to host some videos I wanted to upload - and, having had that failed experiment before hand, I can see why the instances that do survive are often those with more stringent filters and less generous with resources.

So, I am sorry to “chime in about the shortcomings”, but hosting a PeerTube instance can be a demotivating experience. You set up the infrastructure expecting to contribute to a space reminiscent of the old youtube, and you see it filled with spam. The signal-to-noise ratio is just awful and it is expensive. To avoid this, you can be an aggressive gate keeper - but this makes the platform less friendly to people who are looking to find a space to share their original content. Gate keeping is also an additional effort that you need to make. In the end I chose to just shut it off as it was more of a hassle than fun. By comparison, hosting a Lemmy instance is fun, much much cheaper, and little hassle.

I still haven’t given up on the idea of Peertube, though… I have some video ideas, and when I finally get to making them I plan to make another instance to host only my channel. Then, I would be able to host my own channel using my own infrastructure via a federated network. This use case would work very well for me, and it can probably work for many others. So that is one way of building the Peertube network.

General permissive video uploads is something that makes YouTube such a powerful platform though, and that is very difficult to replicate.

Ok! I’ll update you then 😄

Hmm, you are right, it is possible that the initial activation is more difficult if you are not in NL.

I found a forum post of someome having problems with a KPN sim card, but for LycaMobile I still don’t know: https://community.kpn.com/prepaid-16/sim-card-activation-doesn-t-work-in-germany-591780

I wil be going to Germany in a few days so I will bring one of those SIM cards and check what happens when I try to activate it, I’ll report back.

Lemmy, but very rarely

I looked up LycaMobile in Germany and was surprised to find you have an entire ‘Prepaid SIM’ wiki, ha! https://www.prepaid-wiki.de/tarife/Lyca_Mobile

Germany is not too far from NL. I think you can just order a Dutch SIM card. If all you want is for it to be active, I don’t think it would be a problem as you would not actually use roaming services. Just top up via code every 5.5 months or so by dialing 101CODE#

I have not tested this myself so there may be some special rules I am not aware of, but I have often kept phone numbers abroad for years - just not Germany specifically

In NL, one option is to get one of these: https://top06.nl/products/lyca-mobile-simkaart-5-euro-beltegoed

It is also possible to buy one of these with cash from many shops.

This one lasts 6 months each. You can buy several of these and replace every 6 months if you don’t mind changing the phone number, or top-up €5 every ~6 months. You can buy the 5 euro top-up code in person from many shops, using cash, or online in a website like this one: https://kaartdirect.nl/beltegoed/lycamobile

Yeah, as others mentioned, you can get cheaper data plans depending on the monthly data you need.

However, one of the interesting properties is that, unlike with phones, there is no restriction on the number of pagers that can listen to your assigned RIC. You can use one subscription to communicate with as many pagers as you would like, and each individual pager can be programmed using text filters such that one can implement their own sub-address system.

I suspect so too. I contribute to the local network with a few nodes :) In a controlled, coordinated setting it works well, but continuous reliability and coverage are still challenging.

Thank you for reading! Happy you find it valuable.

I think that the Dutch make some good/interesting infrastructure choices.

LoRA is sort of a slower version of wifi and as such, you should assume Meshtastic is monitored, at least for traffic metadata. The actual messages are encrypted though.

LoRa is great in that it gives us direct control and ownership over the infrastructure. One can participate in the network without their identity being known. But, yes, traffic metadata specifying the sender and recipient identifiers are plain text and can be easily logged.

Default configurations will have your device broadcasting often to contact new neighbors and will re-broadcast incoming messages. Since the device is quite active, and the chirped signal signal so characteristic when seeing via an SDR, someone who is actively tracking a Meshtastic device can do so very effectively.

Still, the fact that you own fully the device and have total control over it opens up a lot of possibilities. To give one example: if the mesh around here were strong, I could make use of a device configured for Rx only as a meshtastic pager. I might set up my Raspberry pi to inject a message from a randomized sender via MQTT in response to an XMPP message. Then, I would not use any radio transmitter at all.

For regular peer-to-peer chatting, yes, the default properties are very leaky, but we can change some of what we don’t like.

There is actually still such a thing as a satellite pager, a receive-only device that can get pages that cover regions as big as small countries. They stopped making the receivers quite a while back, but some are still around and the subscriptions are still available, though expensive. This info is itself some years old so maybe they are all gone by now.

That is very interesting. When I looked into satellite devices I only found two way devices, like the GARMIN inReach. I figured that it made sense that satellite comms would be 2-way because broadcasting all over the world seems rather extreme.

I have searched for these now and found the Iridium 9501 from Motorola. It is pricey, ~$680 for the device and either $90 (150 messages) or $150 (unlimited) per month for the subscription. In the description it says that you do need to program three ‘Message Delivery Areas’ as the messages are not broadcast globally, but I think this is acceptable.

Thanks for pointing that out. $90/month is pricey… But it is cool enough that I would seriously consider it if I would travel a lot for work.

POCSAG pagers still exist in the US too, though again, they are quite expensive compared to cell phones. Their main attraction is supposed to be higher reliability, so e.g. doctors can get paged even with the mobile phone network is out. I don’t know if that advantage still exists. In the more distant past there was something called ARDIS which I think is gone now. That was quite a robust signal, so you could get paged even in sub-basements of buildings and places where mobile phones didn’t work. Repair technicians who worked in those places often carried them.

I think that the advantage might still exist, especially in buildings with thick walls and underground floors. While looking into pagers I found discussions about them being phased out in many hospitals and replaced with ‘EPIC secure chat’ and with sharing private cellphone numbers.

In the Netherlands there is also the P2000 system, which is considered to be very reliable. That network makes use of FLEX to send messages to emergency services. It is possible to easily capture those too using SDR, or to see a live dump of these messages in sites like this one: https://p2000-online.net/alleregiosf.html

I’ve followed this stuff slightly as it’s interesting for the reasons you say, but I’d have to say it’s not really cost effective for most of us. POCSAG in particular only works in relatively localized areas like single countries. I know a guy who would want something like it, but only if it worked pretty much everywhere, since he travels a lot.

Yea, I can see that. So, that guy might like the satellite pager, but probably will not like the price tag.

Thanks for your reply!

I do like Meshtastic a lot and I am still trying to get the most out of it. But there are too many gaps around here. In the city there are more nodes, but also a lot of buildings. Outside of the city there is more line of sight but few nodes.