These definitely all had a stable identity (ICQ number etc.)
What I mean is having an ad-hoc identifier per contact/group chat which doesn’t allow your various contacts to correlate that you are the same person.
What I mean is having an ad-hoc identifier per contact/group chat which doesn’t allow your various contacts to correlate that you are the same person.
Like... icq... yahoo messenger... old skype... ?
And even some modern mobile chat apps i think.