I guarantee that in most showings there will be at least one person there with a kid under the age of 8 because they are too damn cheap to get a babysitter or too damn spineless to tell their kids "no, you cannot go to an adult movie" (by adult I mean rated R). I am also willing to bet you will find kids under 5 at showings as well, unfortunately....
The worst thing I ever saw was when my wife and I went to see Blade 2 in the dollar theatre (yes yes, dumb move, whatever, it was frigging BLADE for 1 dollar total admission!)
About ten minutes into the movie, this guy walks in, with his wife, his probably 8 month old baby that he was holding, and two kids who were probably 3 and 4 years old, IF THAT. They could have been 2 and 3 year old.
And I'm not kidding when I say that throughout the movie, these kids were scared SHITLESS. I mean, Blade 2 had enough disturbing imagery in it that I thought "Holy shit, that's freaky."
And here is this fucking asswipe, and his asswipe whore wife, and they're fucking just mentally KILLING their kids.
If I had brought my phone, I would have called the police. That's just fucking child abuse right there...
Edit : I think I need to fire up the trilogy tonight, talking about Blade makes me want to see vampires getting dusted. This comment was edited on Oct 21, 15:47.