Most are repulsed by animal cruelty - a Philadelphia made a video tossing kitties and may be charged. I'm going in a somewhat different direction - a database of animal cruelty and other events that are often in a murder's profile should be recorded. It won't prevent every instance of mass murder like at Aurora Colorado, but it should stop some of them. Philadelphia man faces charges after police discover video of kittens being tossed - U.S. News
That sort of stuff happens all the time in factory farms. If animal abuse is against the law, factory farms should not be exempt. Given all the bad things factory farms do, we would be better off if factory farming didn't exist.
^ I see your point and don't disagree. Just saying that cruelty like in the article is a red flag he might eventually do it to humans.