McDonald's did know their coffee was too hot though. That was the basis of the case: McDonald's was, due to using very low quality coffee, was heating it to excessively high heat to produce the desired smell.
The thing is, how many retired players have back problems or knee problems? I'd wager is it a pretty high number. Why? Because competing at that level puts enormous strain on those parts of the body. Why is it that the head is viewed as so different? You are colliding, with a great deal of force, into someone else repeatedly. We only care because "concussions are bad" and "my name is Favre and I can't remember my daughter's name; but, I can remember to herp derp and send some dick picks to women who aren't my wife" gets the media coverage. Nobody cares that Joe Blow used up running back can barely walk anymore due to knee problems.
