This report is very difficult to understand. I will say though, that if the last movie was at 11pm then that's usually the last call for ticket sales. Granted, everyone knows that previews run for 5-10 minutes but after that they generally shut down tickets sales. So movie theaters are different in that regard. About 5-10 minutes after the last showing is the last of ticket sales.
Obviously, they ticked you off. And there is no reason to be rude under any circumstances. I would be curious to hear their side of the story. The whole thing just doesn't make sense in that, "why would they care IF there was still people in the theater?"
I've been in the same situation before where a restaurant, like a drive-thru, closes out the lights right as you pull up. I kind of come from the belief that the customer comes first and the customer keep us in business. I would probably serve someone if they came in the door at 11:01 but that's just me. I have worked for a lot of places where the employess just hate that last minute call, or walk-in by a customer. Unless it's a situation where you HAVE to get out the door right away, then I don't understand acting that way.
I would go back there, make your complaint and see where that gets you. But you have to chill out a little. Your whole report is "rude, rude, rude, jerks, B, white trash, jackasses, etc. If you go on and on like that, you will lose your case. It's never a bad idea to contact their corporate office as well.