"But....is he also at fault? Should he have not been aware of the danger he was putting himself in? Of course. Is it not "reasonable" to expect that a hard fast line drive might be hit directly at "somebody" and that "somebody" might be him? Yes."

I agree with you. However, many, many people have never actually been on the other end of a 100mph+ line drive, and they actually don't comprehend that they will have lest than 1 second to react and protect themselves or a child. My baseball 'career' ended after high school, but that was enough to understand you have to be as alert as the infielders on the field, on every single pitch, if you want to sit in those seats and stand a chance of protecting yourself.

And baseball isn't marketing those seats by saying "you could have your skull smashed and lose your eyesight if you sit here". The nets will come.