Bingo. Signal for example, is also subject to US law. They can be compelled to reveal everything they have in a person. Which they happily do: they hand over a

Bingo. Signal for example, is also subject to US law. They can be compelled to reveal everything they have in a person. Which they happily do: they hand over a page with the date of account creation and the day it last connected. Which is all they have. Don't collect information, and you don't have a problem.