Well, my son is an adult now and what he does at sleep overs is none of my business, lol, so I guess I'm just answering with my daughter in mind. I knew how to DIY a pipe out of some plumbing fixtures by the time I was the age my youngest is now and I would be horrified if she was doing that or any of the many other things I'm not going to mention. Hopefully she's got more common sense than I had. I try my best to be a good parent and I still worry like heck about everything but I think there's a point--as children progress to teenagers and start being more independent--where you just have to say, "Jesus take the wheel" and pray like heck that they actually use that brain in their head when they are away from you.