Suddenly a phone going off in the middle of a movie doesn't seem so bad.
As for the guy tripping out, well, by all rights he's probably sitting in a jail cell right now where he belongs. As for the people who restrained him and got him out of the theater, it took a hell of a long time for the police to show up... and if this guy had had a gun or other kind of weapon who knows what he might have done?
With regard to the question about having a seizure, I think it's unfair to compare the two situations. This was a guy, clearly coked out of his mind and going apeshit to the point that he was being asked to exit the theater. He refused. That's why he was forcibly escorted out. You're worrywarting about two different scenarios.