I was in group homes and juvenile detention when I was a teen, but it wasn't over drugs or other addictions. When I was on the inside I would occasionally come across people with burn and especially cutting scars. I assumed someone else had hurt them, because at the time I had never heard of self-mutilation. Through the years I have run into many people that hurt themselves intentionally. I don't believe most do it for attention, because most of them do it in private. I don't think it is a suicide issue either, because (usually) it is not fatal. It isn't just kids either, I had a girlfriend in my twenties that used to intentionally cut her legs in the bathtub so she could watch the blood flow into the water around her. Some of these people are punishing themselves for something they feel guilty about. Others are doing it as a "release". Other people have their own reasons. It can be an addiction that can be as dangerous or even more so than drugs.