Bill Simmons had concussion expert Chris Nowinski on this weekend, talking about all the damage being done:
http://sports.espn.go.com/espn/page2/simmons/ (top right)
During the podcast, Simmons asked whether in a few years football would turn into boxing, with mostly poor minorities participating because they didn't have much to lose. As soon as he said this, all I could think about was "Pahokee, man". As a well-off non-athlete, how much responsiblity do I bear for watching these kids bludgeon themselves, possibly causing long term damage?