It would be difficult though to keep violent people from watching violent movies. How in the world could that possibly be accomplished? However, at least we know that some of the concern about violent movies and games, at least in regards to non-violent people, is overblown. Again we see that in order to keep stuff out of the hands of those who are negatively influenced by it, is to ban it for everyone. That would make a very dull world, indeed.
Perhaps the best solution is to try to improve the parenting and environment of children so certain violent prone personalities don't reach full potential. In that case, violent movies and games wouldn't influence them as much. In other words, just cause someone has the potential for something, doesn't mean they will act on it.