I am a little concerned that we're all still personalising it a little much, though
If a person in a group is rude, obnoxious, doesnt stop sexual advances when asked to, and exhibits other behaviors suggesting severe anger management issues and possibly severe mental illness would you not tell your friends so they can know NOT to invite this person over for coffee? Or would you ONLY tell your friends and not the others in the group? I mean not that anyone has an obligation to share this info but it just seems like it would be a good thing for others to know especially with all the internet related crimes. I know that what happens at fests and parties should stay there but I would think in the case of a person going beyond what is even a little acceptable then an exception should be made.