I never freakin' tolerate people talking near me during a movie. It happened most recently with a bunch of young girls when I went to see The Fault in Our Stars... they were honestly making a تبصرہ about EVERY freakin' single line in the movie.
So I just lean over, tap them on the shoulder, look directly at them and ask "Excuse me girls (or boys), but please keep it down, you're disrupting the movie".
Every single time it has worked, I aint gonna just sit back and just internally کتیا, کتيا about it xP
The dramatic sigh. If that doesn't work, leaning over and saying "Do آپ mind". Third is "Shut up یا I am getting the manager!" I have never had to make good on the threat. With the price of فلمیں getting so high, I don't go and pay to listen to idiots that are old enough to know better.
Tell them to shut up, یا I'll beat them till they piss blood. Failing that, I'd likely just ask to stop talking... of course, teenagers seem to be getting مزید and مزید obnoxious these days... the first option seems likely...