I go to the movies a LOT. Not to a special premium cinema or anything fancy, just a regular cinema. (one of the cheapest in town as it happens) and I never experience any of the problems people on here talk about.
Basically never had a problem with people using phones in a way that is distracting or talking loudly enough that its distracting or kicking the seats or doing anything else annoying enough to make me want to complain.
The movie I went to the other day had a big message right at the start saying "dont put your feet on the seats, put all your rubbish in the bins, switch your phone off and dont talk loudly during the movie" and people respected that.
They also have an explicit ban on outside hot food/fast food (e.g. Subway, Sushi, Mexican, burgers etc) so you dont have to worry about someone sitting in the theater eating smelly greasy food.
Why American theaters (the big chains in particular) are so reluctant to simply ban these distracting things (feet on seats, using phones, bringing in smelly hot food etc) and kick people out who break the rules I dont know.