RBCI shouldn't be read literally as the sum of its words. IMO, the spirit of RBCI was laid on in the opening pages, and mostly adhered to.
An RBCI is a card that is humorous before anything else. Some of them are mechanically sound and/or balanced, while others are intentionally unintelligible or ruin the point of the game just by existing. They are Really Bad on purpose.
Cards that happen to be really bad, but which weren't made for the purpose of comedy, should have a separate designation, such as CIWHTBRB (Card Ideas Which Happen To Be Really Bad). But we don't exactly need a forum specifically for blasting random fan sets. If we really want to give feedback for fan sets, there are more diplomatic and constructive ways to do so. But posting it in between Scoutpost and Bananaphone doesn't help them, and doesn't give us RBCIs in the traditional sense of this forum thread.