Refs can stop matches. They just need to do it more often, in my opinion. I have seen WAY too many injuries because a ref didn't call a match. In fact, the only person I hurt, in competition, all year was because of that. I even asked the ref if he could hear the guys foot and knee popping. The ref said "I do, but im not going to stop it". Then boom, his leg gives out and he has a completely unnecessary injury.