You know what scares me? Child actors. They're so creepy. The creepy way they have these huge grins on their faces while they shill grapejuice with a drawn on Kool-Aid mustache.
All the while, you just know that some psychotic parent is standing in the wings pointing to their face, mouthing the words "More Teeth!", veins busting in their forehead.
I think the only thing creepier is midget actors, because you just know some ringmaster is standing in the wings with a whip, mouthing "Look happy! Look happy!"