gem74, that is funny, yes, but it's a "trick" that some trainers/handlers use in halter classes to help mitigate a somewhat off bite (it can't fix one that is severely off, though).
I have also been to AMHR shows where bites were checked and I saw this happen at more than one Area National show, though not EVERY one, and even though it's a gimme on mares and stallions to check this, it still happens on geldings on occasion. I am always proud to show my horse's perfect (or near) bites, though I have also shown a filly that had a full tooth off bite (under).
We were not "dismissed" but placed at the bottom of the classes and while I wish there was a "gelding" class for mares, the sad fact is there was not, and we were just having fun w/her though we did ok in color sometimes, there was little else we could do w/her as a weanling/yearling, and since she was not to be bred, we gave her to a pet home.
I never ever intended to breed her, but there was no way I could say that, though they did check at both registries in various shows and we never were "dismissed" even though IMO, it was severe at a full tooth's depth off, we merely got last place or next to it.
I do consider it a serious flaw, probably even a half tooth off would take it out of MY program, as I have so few horses, I really don't have room to gamble. Also, when in conjunction with other faults, I consider it a warning sign of dwarfism (this filly was a "genetic dwarf" I feel as she had at least two other symptoms but not enough to keep her from being registered).
Liz M.