I think "STOP HURTING YOURSELF" means that teenagers should stop doing stuff to hurt themselves and don't try out stuff like for example cocaine or alcohol are considered as drugs and teenagers these days tries are idle and do stuff that could damage their intestines and other parts of the body. It also means that you should not try to do things that you think will hurt your parents or someone you are mad with although that person will be upset you are not hurting them you are hurting yourself. I think you put that sign up there because half the time teenager and thinking idle things to hurt themself and you put the sign for people that are in that situation to walk up and realize they are only hurting themself. When I heard about the incident that occurred yesterday I was shocked because I didn't expect someone in the ninth grade to do something like that. She probably took more than enough and mest up her liver. It affect me because that's sad and I actually sat down and think about that incident and that was on my mind for like the rest of the day.