True, didn't think of that.

I guess a much lower voltage of let's say 200 volts would kill a device just as effectively and probably wouldn't arc itself.

Another option would be a smart device that first senses some current and only then dumps the 20kV.

USB-C has a lot of pins, some custom built cable could use nonstandard pins for power and data and the standard data ones for the 20kV line.

Or just run the 20kV line on the data pins and leave power standard. That way you can use a power-only cable to charge the phone.

Just an anecdote, but every time I try to create an account on Instagram I get automatically banned after account creation before even login-in for the first time.

If I recal they then ask me for a copy of my ID to confirm my name is real (which it isn't).

I have no idea how they know, I've tried literally with different residential IPs, different emails and even on brand new devices. On my Instagram user friend's house.

Maybe it's just bad good luck, who knows. In don't need Instagram anyway, just an interesting fact.

It can be pseudoanonymous if you use it that way. If you login to it via tor for example and only use it to communicate to people who aren't related to your IRL identity.

Besides cash and mail is still much easier to track than Monero

The quickest and dirtiest and least secure way to copy text (or files) between machines is using netcat. I always end up resorting to this method when in a hurry.