Very tragic. My heart goes out to the families. You've been having a rough couple weeks NFL Fan hang in there bro. I too was one of those kids who did stupid and dangerous crap in my younger years and count my lucky stars I made it through alive. I have similar stories of people I went to high school with getting DUIs, crashing their cars, going to jail and also dying in car accidents. Its true that life is short but it can be made even shorter but stupid decisions.
Like NFL Fan said this goes for the grownups too. You'd think as you get older and you see people you know ruin their lives or ruin anothers life or worse take a life or their own that they would make better decisions. Sadly thats just not the case. I am always amazed when I have people over to my house there is that one person who get completely shat faced and thinks they can drive home. I am always cool about it at first and try to reason with them I say things like "dood I got a comfortable couch with your name on it, I'll even make you breakfast in the morning." Or, "I'll pay for the cab and pick you up and bring you back here to get your car tomarrow." When that fails I and if they stat getting bent I tell them straight up "I could give a ship about you! What Im concerned with is that person you might hit and kill because you're being a retard." It sounds harsh but thats the way I feel.