Someone should have told him. It's easy. It goes like this: "You're being a dick. Stop it or you will have no friends."
I know it's not popular and there's probably a law against it, but there are times that it just has to be done.
"You hurt my feelings," the small person launched her personal grievance. "And ... she said just working up to a courtroom final flourish, "you called me a dick."
I have to admit I was a bit taken aback at this. The argument was at least five minutes ago and I'd already moved on ... had I really used the "D" word?
Yes apparently. And I'd told her she'd have no friends if she kept speaking to people in a way that treated the world like room service on permanent call.