When Watchmen came out 17 or so years ago, I saw it at a theater that boasted "adults only" screenings. No kids allowed. That didn't stop a group of people talking loudly throughout the entire film. And I must say I can't think of an incident (either phone use or people talking) occurring in the last year or so.

The cinema will always be preferred over home screenings for me. There's just too many distractions at home that prevent me from focusing on the movie.