rack you would be surprised how little of a problem having the bulls at the shows really is...like simmyman said if you grow up in the jr livestock program in Louisiana bulls are just a natural part of it. Every one of the Jr shows in Louisiana from Jackpots, the LJLA (which is run by the same folks as TJLA by the way), Parish Shows, State Fair, District Shows, and the State Show. All allow bulls to show, I would venture to say that heifers cause about 3 times more trouble than bulls if not more.
Like I said my heifers always had far more attitude and temperament problems than my bulls, and I started with Americans. I even knew a guy who raised Maine's and took his 7 yr old tgranddaughter to show in the open shows. He would send her in the ring with a 2 yr old bull without flinching, but refused to let her go in the ring with a heifer at that age. I cant recall ever having an issue with a bull when a heifer in heat was around. When they have been in the showring since they were little, first thing on their mind is showing it seems. And if one did try to mount something it didnt take much of a tug on that nose ring to get their attention.
I dont think you would see many more wrecks if you added bulls to the line up, and the ones you did see would still probably be likely caused by heifers if you asked me. But thats just my opinion, and I am not advocating Texas adding bulls to Jr Shows, but at same time I wouldnt be against it if they did.