Closed captioning: Required by law in a theatre near you
Link - Closed captioning is required for deaf people and mothers of small children to enjoy a movie! Personally, I haven't watched a movie at my house without subtitles since my son was born four years ago. When a DVD doesn't have closed captioning, I generally don't even watch it because I know I will be watching one scene over and over again trying to get through it one more time without screams, cries, pleas or crashes in the background. So now when I go to the theatre, it irritates the hell out of me when I don't understand what they're saying and can't read the subtitles.