Outcasts are vulnerable, yes, but that's why you try to prevent becoming one. I have seen Dogville, but I don't see why this fictional anecdote would refute my thesis which is based on what I believe is the consensus in modern anthropology. I didn't imply that 'nothing nasty would happen to anyone', that's a straw man. I merely pointed out a contrast between small close-knit groups vs. large anonymous crowds.