Oddbean new post about login | logout Too much risk for less profit. I would never reveal my phone to a nostr client. Phone's are registered by governments.
this is why cryptography exists, to do things like this without having to reveal your number to anyone. If you are paranoid about it you shouldn’t use a sim card. Also this doesn’t have to be a phone number, it could be any piece of data shared among friends. Phone # is just the obvious one that is in contact lists.