It sounds like it was the management software rather than the printer itself. This was about classified docs and there was other evidence too including video surveillance.
Airplane mode might be enough to shut off the radios in a phone that old. Also the 3G network is basically shut down now. So it's a matter of just how careful you want to be. You might be able to use some kind of field strength meter to tell if the phone is still sending any radio signals.
IDK if there are many of those things still being made, but sure, if there's any private info on the player and you're trying to be ultra careful, then get one without Bluetooth. I can also imagine (IDK if this has actually been done) someone using a bluetooth attack to turn the player into an audio bug from (say) the next room.
Players do tend to have built in microphones so you can use them as audio recorders. I had (and mostly still have) a bunch of different ones, though they were audio only and not video, or at any rate had tiny screens. There are tons of them on ebay.
If you're going to carry a big player with video and an ebook reader, why not just take your phone? Put it in a mode that blocks all calls. Or get another phone and use it with no sim and turn off the wifi. Then you can run your usual audio and video players. Dedicated players were once popular but now are very niche, since everyone uses their phone now.
FIIO makes some good ones if you still want to shop around.
Ehh still seems useless, they then just have to age the accounts before posting. One thing I'd want to know is of those posts are in topic areas that anyone would want to influence surreptitiously.
Wait what? It doesn't sound like there is anything to revive. IDK what it means to be "left on read" but yeah, move on. If it's a long term Discord maybe things will reset themselves after a long enough wait, but don't bet on it.
I was only able to make sense of this after looking at the Hexbear crosspost and following the comment thread. It's a parody of a similar map of China.
You have it approximately right, serving from an https domain does nothing to authenticate the thing being downloaded. There is such a thing as signed downloads, authenticated by a "code signing certificate", used for things like Windows installers. Linux distros tend to use PGP signatures instead. Signing the download can in principle be a more secure process than serving a domain over https, since servers get pwned all the time. The download signing, by contrast, can in principle be done completely offline. There is a catch to that involving connecting to a timestamp server, but that gets into the weeds.
There's no ruling yet, just some tea leaves. Bad headline.