[Zedseayou]

At least personally, the privacy violation is most clear if you are not part of a community that uses encrypted messaging by default (nearly everyone I know who uses SMS/FB messenger). The fact that someone I know has downloaded Signal then reveals that they now care about using encryption, which usually has the very obvious inference that they are involved in activism/have journalistic sources/other more nefarious activity that they care about encrypting. You can usually figure out which it is if you know anything else about that person. I would not know this if Signal didn't push the information to me, since I am not going to constantly search my entire contact list to find this info.