Alright guys, let's do a thought experiment. I assume most of you run, or are part of, a small group chat with your boys. Let's say, someone brings someone else in, and you let them. But, you learn something, that person has done "Something" somewhere (i.e. these are actions they've taken BEFORE, not differences in personality, or worldview, or things they do in your server), that makes you not want to associate with them and you consider removing them from the group chat. What are the list of those "somethings" that that event would have to be to illicit that reaction. As usual, I'll start.
-had or have attempted to have inappropriate contact with children
-has expressed desires to do above
-has killed, or attempted to kill someone in cold blood (i.e. not self defense)
-Is British, Canadian, or Australian
Point being, I don't think there's much of a slippery slope to worry about here.