The point is that the spirit of scientific inquiry cannot be divorced from risk, danger, and even the occasional mischief. As we've heard over and over and over again, it is commonplace for folks who are going through their formative years and interested in science to do things like create experiments which go horribly awry or even to get up to dangerous mischief. As I mentioned elsewhere, there are appropriate ways to ensure that people learn the right lessons about potentially dangerous activities. And the right way is not "don't ever do it, don't even think about it, you'll be punished severely".
You or your friends didn't do anything destructive in high school and get away with it? I did...