Signal tests usernames that keep your phone number private

https://www.bleepingcomputer.com/news/software/signal-tests-usernames-that-keep-your-phone-number-private/

https://twitter.com/home/status/1722379158448193751

https://twitter.com/home/status/1722379237460713981

https://twitter.com/home/status/1722382456462913818

https://twitter.com/home/status/1722394510116704498

https://twitter.com/home/status/1722395735704863080