Yahoo: Kids. They're cute. They have unlimited amounts of energy. And they have a baffling affection for Justin Bieber. Sometimes, however, the little ones seem less like adorable cherubs than pint-sized sociopathic fiends hell-bent on bringing pain and destruction to all who cross their path -- be it from demonic possession or simply too many bowls of Fruit Loops. With "Let Me In" now playing, let's look at some of cinema's creepiest kids.