In all fairness, there is a level of trust that has to exist between football players out there. Offensive players trust the defensive guys not to lead with their helmet, make late hits, or do anything else that could potentially injure or cripple them. Defensive players have the same level of trust for the guys blocking them. And yes, many people have died playing football over the years. A hard enough blow to the head can do serious damage to a person, ya know?