Does something like this exist?
Briar is end to end encrypted without any other methodology to identify you besides the meta information (briar hash), so it's as private as it can get. But, it's painful to do a handshake, both peers need to be online at the same time.
Encryption is a cat and mouse game that shifts the focus from personal rights to technological prowess.
Of course the problem of law is harder and less fun to discuss, but eventually is the only path to true privacy.
It creates a 66-digit alphanumeric number for user identification when you create a new account.