Gonna level with you guys, don't know how any of you are legitimately scared by the idea of a murderous clown, any more than a murderous anything else.
As a kid, sure I get it, but as an adult, a threat is a threat, dressing up like an asshole clown would honestly make me take you less seriously, like some type of amateur juggalo; if they had a weapon fear is certainly rational, but I really don't give a fuck if they're dressed like a clown or Captain Planet at that point.
A lot of phobias that don't stem from actual traumatic experiences; I don't see how you are unable to rationalize them away as adult men.
Honestly isn't Pennywise worst enemy really just adult rationality?