Kid Who Kill Sitcoms:

When you add a little kid to a well established sitcom, you know it's over for the show. I came across this because it linked to a post I did on Robert Reed's pedantry. Still, it's kind of cool. What strikes me is that a number of the killer kids -- Leonardo DiCaprio, Ralph Macchio, and Janet Jackson -- ended up much bigger and more important that the original shows they killed.