Sitting a person down and having a group tell them everything bad they have done is severe bullying. Even if the person being sat down is truly an awful person, that tactic is so horrible that it is unacceptable.
Pretending to know everything closes the door to finding out what is really there.
Madness string 95109
It would probably be a third-party website. I don't trust the Wikimedia Foundation to not fuck it up.