But biting in the stall is not the same vicious propensity as deliberately jumping onto a rider after dumping him. I think the liability situation would arise if somebody was allowed to ride him without being told about that, not chomping on a kid who got too close. Perhaps if they were selling him and letting prospective purchasers ride him (of course that's where a lot of problems arise, because the owners are trying to sell the horse and are sometimes too reticent about his bad habits . . . )
That's why my trainer got rid of her colt. He was just too mean to keep around, he was bad in the stall, bad in the paddock, and bad under saddle. He was a walking liability suit, and I'm glad she sold him, too many kids around the barn.