I think our society has become obsessed with applying blame with a scatter gun for everything that happens. The fact is none of us know the real circumstances behind this event or what happened in his life to take him to the moment he died. The kid screwed up and unfortunately the odds weren't with him this time. What he did happens how many times, somewhere, every day. Could the parents have done something to stop this? Probably. Could the boy prevented it? Definitely.
I've done far too many idiotic, insane, crazy, criminal and just plain stupid things in my life to be too judgmental. I don't blame my parents for any of it. They never even had a clue I did these things. I had excellent grades, never got into too much trouble at school, held a job all through high school and got into a really good college. Most people thought I was the ideal son. I did finally get smart but that happened half way through college. Fortunately, I was lucky and survived.
I guess my point is that any parent would default to blaming themselves in some fashion should anything happen to their child. My sister died in 1968 from being hit by a car while riding a motorcycle. If someone would suggest, in person, my parents were to blame for this we would probably be rolling around on the ground. I have seen personally the tragedy of what the death of a child does to a parent. It ripped my father apart for decades until he died. I'm sure this kids parents are second guessing the hell out of themselves. I always think just how a small change in events the night my sister died would have resulted in her being alive today.
This is just one of those events where you can blame nobody, everybody or just the kid behind the wheel. Take your choice. It really doesn't change a thing. The kid is still dead, his family is miserable and will be for a very long time, possibly the rest of their lives.
BTW, Joe, this wasn't directed at you. It is more of a general response to the whole thread.