Haven't read the entire thread, apologize if it's been said/covered.
I've said it before, if we want to get serious about head injuries there needs to be rules regarding how players tackle. If you use your helmet once, you sit out a few series (or a quarter/amount of time). If you do it again, you sit for the rest of the game.
I'm not an expert, but my eyes tell me the majority of the problems come from players putting their head down and using their helmet as a weapon. Carl is right, either take away their helmets, or take away their playing time if they use their helmets incorrectly.
I've said it before, if we want to get serious about head injuries there needs to be rules regarding how players tackle. If you use your helmet once, you sit out a few series (or a quarter/amount of time). If you do it again, you sit for the rest of the game.
I'm not an expert, but my eyes tell me the majority of the problems come from players putting their head down and using their helmet as a weapon. Carl is right, either take away their helmets, or take away their playing time if they use their helmets incorrectly.