They creep me out mainly because what kind of grown man dresses up like a dipshit and puts on makeup, then goes and befriends children, you know? A fuckin' weirdo, that's who.
I mean, there are PLENTY of good people out there who are clowns for kids because they genuinely like to make kids happy, but there are also the pedo's that want to take Johnny behind the shed and fist fuck him.
Which, of course, inspired the song "Hey Jude."