Justamom, that guy was pretty cool. That is the way I would and have interfered before. But I only interfere if specifically asked, I don't believe in saving people from themselves.
I have been the victim of that Waffle thing you guys describe also, sucks to have a girl come onto you strongly and then her Sisters come over and insist she has to go home, even if she says she'll ride hom with you.
Would have blacklisted that sorority if they weren't so good looking.