A reference to the Twilight
Zone episode, "It's a Good Life," in which a mutant with godlike mental powers, in the guise of a monstrous 6-year-old boy, sends with a wish anyone and anything that displeases him to a
limbo-like
void known as The Cornfield. This term is frequently used on Metafilter to describe the banishment, temporary or permanent, of members who disregard the sensibilities of The Community.