Verification with a real cellphone number (non-VoIP) is statistically/numerically a good anti-abuse tool. If Signal wants to allow no-phone-number accounts, it

Verification with a real cellphone number (non-VoIP) is statistically/numerically a good anti-abuse tool. If Signal wants to allow no-phone-number accounts, it should mark them as such to the other participants in the conversation. Discord does that, and it seems to work well. But this is a separate argument from using your actual phone number in-app and allowing anyone who has your number to find you in the app.