Quaker has this one nailed. Think of the dangers of illicit fork usage, or chopsticks, or (it makes me shiver and shake even to say the word) skewers. The possibilities are truly frightening. We should start a movement to ban all eating utensils. It's only right. Think of the children.

Alternatively, we might think about throwing those Chatty Kathies out of the movie theaters.
I think it all goes back to... An armed society is a polite society.
m58 is right on the money. You cant legislate people out of being violent and having no regard for human life.
I would also like to know if this movie theater was a "gun free zone". I am sure that if the people that were attacked were CWP holders they would be raising hell right now, but I would still like to know. Many movie theaters are posting signs now, and paying off-duty cops to do security because they are becoming hot beds for violence. I ran smack dab into one of those signs not too long ago at a movie theather when I was on vacation. There was a very heavy police presence, but it would not have prevented an attack such as this.... might have made it more difficult for the BG to escape, but it still probably would have happened in all the confusion.
The world aint what it used to be people.... the lesson to be learned here is "keep your mouth shut, cause it aint worth it".