No offense, but y’all are aware that at least one of Jack’s mods reads the thread. How exactly would you go about preventing them from joining and having the same situation?
In fact, I fear that nothing would change... the only way would be to know who the intruder is and keep him excluded from the chats.
I think one way to share again and make it harder to be tracked could be to create an account and start sharing after some time (like signing up now and then becoming active in, I don't know, a month?)... like this in doing so, banning the latest arrivals would lead to nothing because the "spy" has been in place for some time