Signal is working on a way to sign up without a phone number. The feature has not yet been officially confirmed, and it is not yet known whether it will be available to all users or in what form.
It’s pretty easy to detect spam. I guess user reports and noticing when someone suddenly messages many new users and those users do not respond.
It’s not so easy, because you could even register a new account for each new spam message, or register 100k accounts & only send out 3 messages a day / account…
It’s not so easy, because you could even register a new account for each new spam message, or register 100k accounts & only send out 3 messages a day / account…
Obviously not. Because this isn’t an issue elsewhere