[asddubs]

you can easily enumerate this data anyway, though. Just go through your contact list and try to add people. You could come up with an elaborate system where the other person has to confirm you, but everyone knows that's rubbish and users hate it. Sorry for the late response, I forgot I made this comment.

[brbsix]

Yes I'm well aware at the ease in which someone could build a client that would provide such a feature had it not been included. Moxie takes great care not to provide mere illusions of security (or in this case obscurity) such as self-destructing messages or other features of that ilk. I appreciate it, and it's a big part of why I use and recommend projects affiliated with Open Whisper. Still don't believe it was the right decision to blast users with a notification from every Signal user in your contacts. Let Telegram or Whatsapp or some other crap play that game.