@rockfan, based on my observations, how an audience behaves is dictated by the genre of the film. This has been my experience anyway. If I go to see what I call a ‘popcorn’ movie that attracts a younger, less serious film audience, then there will be more noise and the audience will be less considerate of those around them.
If I go to see a film that appeals to a narrow audience, the cinema will be quieter and less active. People sit quietly (unless they’re laughing or whatever) and watch the film.
I find groups of young people and old couples are the worst movie theatre attendees in terms of noise and activity. Old couples seem more inclined to talk during the film! I’ve glared at more than a couple of oldies in cinemas. They don’t seem to realise that their whispering is disturbing everyone around them. Groups of young people take longer to settle down, seem to jump around from seat to seat, keep going for more drinks, lollies and the like.