"This way you not only know when to go, but can also find out what you'll be missing. You will no longer miss those ultra-important scenes, or need to come back to your seat and ask someone, 'What did I miss?'"
They have new releases and classics, and now there's even an iPhone app that alerts you when a good opportunity is coming to answer Nature's call.
Link | Image courtesy Elizabeth O. Dulemba
I do not go to the movies just because of those reasons. There is always someones phone going off. Some kid crying in the background and someone getting up in front of me during a movie to go to the bathroom.