As a high school teacher/coach, I have seen young athletes suffer concussions in all sports and activities. I am not an expert, but my limited reading indicates that young people are more susceptible to head and neck injuries than adults. Hence, our decision making on this specific activity is difficult to parse. The most devastating head injury that I've personally witnessed (I coach basketball and did coach football) was on the basketball court when a young lady fell and cracked her head on the floor. I also knew a young lady with concussions from lacrosse because they don't wear helmets (a move that coaches of lacrosse consistently resist). I agree with the sentiment that we need more research on potential damage to children. I think that the CTE and other dementia episodes have largely been seen in former NFL players, which is a far more devastating and violent sport. I'm just not sure if young children have the speed and power, nor repetitive blows in their sport to cause damage.