I've had several experiences.
Most at the movies actually. This woman got a drunk come and sit by her and her children. XD I have no idea how he got in but he soon got himself removed.
When i was younger my father took me to see a film and there was a bunch of teenage boys in there, making a lot of noise and throwing stuff around so after awhile of it, he turned around and threatened to break their nose if they didn't shut up. XD
Finnnallllyy I went to the movies with some friends awhile back, edged through the seats and got these moron girls blabbering and ***** cause we had to sqeeze past, er what? We have to get to our seats I'm so sorry my backside blocked your view for a whole 5 seconds, lets face it, the film was trash you got a better sight anyway.
But that's beyond the point, we'd sat down and they carried on moaning.

Why? I got sick of it in the end i told her if she wants to be a ***** she should go to a dog home, not a cinema.

I got a dirty look from that but she shut up beyond it.
That's your best bet, try to get them removed and if you can't, insult them.

Speaking to you like that is way OTT you shouldn't of put up with it, In a place like that I'd have got them removed.