Just spout off like I do. If someone uses their cel phone, I loudly tell them to turn it off or take it outside. If they're constantly talking, I loudly tell them I paid my $10 to listen to the movie, not them, so be quiet or take it outside. And if they get belligerent instead of humiliated, I get the manager and get them evicted. Several times I have received rounds of applause once the jackasses get kicked out.