I went to a movie recently with someone. Someone who kept talking about the movie while it was playing. Someone who yelled at the screen during a particularly harrowing moment in the film. Their excuse: "I really get into movies."
I get into movies too, I show it by remaining silent and concentrating on what I'm watching. When other people distract me, it pulls me OUT of the film and ruins the experience for me.
Such behavior is disrespectful. It's disrespectful to the other audience members, it's disrespectful to the artform, it's disrespectful to the artists who created the film.
As a filmmaker myself, I find it disrespectful to me, even when it isn't my film that's being screened.
The word "Audience" comes from the latin "audentia" which means "listening" not talking, or yelling, or commenting. At least not in the middle of the screening.
Now, I've been known to offer a brief comment or quiet remark from time to time. Emphasis on the words "brief" and "quiet." Indeed, I made a couple of quiet remarks during this particular screening. These remarks did not distract the entire theater nor diminish their experience because of the rude guy yelling at the screen during the climax of the film.