Ideally, I'd want the people to feel that the behavior is unwelcome rather than that they themselves are unwelcome, but people are apt to have their preferred behaviors entangled with their sense of self, so the ideal might not be feasible. Still, it's probably worth giving a little thought to discouraging behaviors rather than getting rid of people.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.