Want to kill YCHs 4evr?
Make a cuthulu-like mass of tentacles. Indescriminate body type that is LITERALLY all tentacles. Nothing but fucking TENTACLES.
Get a spot in a YCH. Make it clear that this has to be drawn AS IS with EVERY SINGLE TENTACLE. Such a request will massively trigger almost any artist who is lazy enough to just draw an outline and plug something into it, as your blob of tentacles would be unable to fit, in any way, shape, or form, into such a position.
When said artist backs out, start screaming about it, and watch as the white knights gather to back you up. After all, you did pay for it. You did win the auction. Why SHOULDN'T you have it that way?
After that, go after every YCH you see. Rinse, wash, repeat.
The resulting drama implosion will rock the YCH boat off it's already precarious position. After all, who wants to be in a YCH with something hideous? Who wants to be in a YCH with such a drama machine attached to it possibly?