These boys, young men, and men are playing football voluntarily, are they not? By now I'm sure their well aware of the safety concerns of full contact football.
So I suppose it's a personal choice wether they choose to play or not. Coal mining and crab fishing are still dangerous yet people still choose to do it.
Hockey pet peeve: "when a teammate tips a puck in on you, which is exactly how my first collegiate goal against happened. Thanks, Copper."