I sat next to RMS for for several hours and overheard a few of his interactions with people.  I've never seen him before or attended any of his talks, but now I never plan to.  The guy is just a right dick.  Plain and simple, he is rude, obnoxious and so full of himself I wanted to tell him to stuff it up his ass and he wasn't even talking to me.  He has absolutely no social graces at all.