Football season has arrived. But do fans who financially support the sport bear any responsibility for the fearsome health toll endured by far too many of the young men who play professional, college and even high school football?The Journal of the American Medical Association revealed a 2017 study of 202 brains of men who had played high school, college or NFL football. It found chronic traumatic encephalopathy in 87%, including 29% of those who just played the game in high school.