In my particular theater that didn't happen since my family was 60% of the audience (well actually my wife kept getting up and doing stuff until I reminded her we were in a theater) but yeah I've heard it happens a lot now.

I think if theaters want people to keep coming, they will need to make the experience better than home, and that will include enforcing no phone/no noise rules.

We had the usual cadre of Teenaged boys, but we also had an Indian Couple behind us, I'm not sure if that one was cultural or not.