I have to think there are more concussions in other sports like soccer and field hockey - maybe even basketball. Don't see why people feel helmets are needed. It will cause the pley to get even more physical which will hurt the sport. I have been around the sport for about 12 years at the youth level, high school level and college level and I can't recall more than a handfull of concussions over that time period. Best bet is to call the game tighter.