weight limit was my initial thought but so many of the concussions are coming from guys that aren't anywhere near 300 lbs. it's the 250 lb guys with such remarkable speed.
i don't know what to do about it. i'd start with the mark kelso helmets. (some SF lineman wore it) simple, cheap, nobody has to unlearn anything. i think that could help. but these meatheads will have to be forced to do it because they don't look cool enough.
when i was a middle school kid, soccer goalies had to wear foam helmets and mouth guards. I looked like a complete fool but my friends didn't, they got to wear cool uniforms and here i am with a foam helmet, mouthguard, and oven mitt gloves on. so when i was a freshman in high school, screw that i wasn't going to wear them. already looked goofy enough, I didn't need help. so what happens? i cover up the ball and some idiot kicks me in the head. wake up with my friends hovering over me. concussion, what's that? and i didn't come out of the game because that's not cool either.
gotta make everyone do it.