Which is why I don't give anyone my phone number.

fun fact: its worse than that! its not only about your phone number. signal and almost every chat app exposes your chat partners in the system contacts database. It's handy for the contacts app to be showing the list of chat apps usable for someone you know. at the minimum your name and profile picture that you set for yourself will be there and accessible to any apps with contacts permission, and in signal (even the molly fork) if that partner has made their phone number visible, that will be saved here too. and you can't really turn it off for others.