"Re-entering groups is much the same process as far as I can tell. If you have withdrawn from a group people have to know that you are availible and then you'll get back on the list. If people don't invite you to things and it's clear they don't want you then there is only one option. KILL THEM ALL!! Oh wait there might be a second option. Leave them be and let them have their pansy arse little group of incestuous morons."