"I read this comment on a page hosting the video, but I think they raise a valid point--doesn't something like this (the publicity of them confronting audience members more than once and now with video) come with the risk of having some weirdos attempting to trigger them off with a phone? It'd be a stupid and expensive prank, but then, people are strange."
Howard Stern's followers have been doing it for years. Goes along the same lines as that couple caught having sex in St. Patrick's (correct cathedral??), the man who called into the ABC news affiliate when O.J. was on his bronco run ("and a Bababooey to you all"), and also the lunatic who yelled at Kathleen Turner to put her clothing back on when she did that play a few years ago.
The only defense a theater going moron has in this case, is to just plain ignore the phone and act like it isn't theirs until it stops ringing. Then pray it doesn't ring again until intermission so they can turn it off while everyone is going to the bathrooms.
"Sticks and stones, sister. Here, have a Valium!"