The clapping thing doesn't bother me if it is at the end of a movie. I always viewed it as something that just carried over from theater. You enjoyed the performance, so you feel like clapping. No one actually thinks anyone that worked on/was in the movie can hear them. It's just something you do in an audience to show appreciation or whatever.

Personally, I am dead silent in a theater, but as long as people aren't clapping and cheering at every damn thing DURING the movie, then whatever. Not really that big of a deal.