But why would YouTube want to do that? What he did is obviously wrong, dangerous, and stupid, but still I see no reason from YouTube's side to remove the video.
But if you're going to ban dangerous/stupid video someone has to make that determination. And you can be sure that there are a ton of activities that are dangerous/stupid in the eyes of some people (even understandably so). BASE jumping, wingsuits, really any kind of extreme sports, stuff with explosives, etc.
People were doing stupid stuff before YouTube existed. As long as it's legal (which this stunt was not) who cares? Teach your son why he shouldn't do that kind of stuff instead of turning to censorship.