>Couldn't they easily use the phone number associated with the Signal account to find the target's name? What do you mean? They already have the telephone numb

>Couldn't they easily use the phone number associated with the Signal account to find the target's name? What do you mean? They already have the telephone number. It is listed in the subpoena. All Signal is doing is confirming that this phone number has a Signal account - sure, it's not perfect, but I don't really see your point. They don't need Signal to be able to do any of the things you listed.