Hi that's really thoughtful of you, and I understand that you're honestly trying to help people...
congratulations on that!! But -- the cutting's not really Justin's fault. It's only some particular fans of his who've done that, just like those sad stories you hear about some MCR fans. That wasn't My Chem's fault, and this isn't Justin's fault. About him smoking weed, the fact that he hasn't commented on it implies that he's ashamed, and was very likely pressured into that one-time thing (if it's really true). Maybe he wanted to prove he wasn't just a kid, or something. It wasn't good, but everybody makes mistakes, and he didn't know it would lead to the cutting. I'm BOTH a Killjoy and a Belieber... yeah, and as good as your purpose is, Justin can't really be blamed.