I guess you are right, although the point I meant to make, was the fact that the traits they have tend to be used in horror movies, not necessarily on clowns themselves, but on other horror characters. Ridiculous sized feet and hands, eyes and mouths that take up unnatural portions of their face etc, but I guess cartoons do that as well. However clowns used to make me cry as a child, but I loved cartoons, so I don't know :P