The sign thats says "Stop Hurting Yourself" means to stop doing things that will have negative outcomes. I think its up there to encourage us to not get angry or frustrated and do something dumb when something else goes wrong. When my brother was a senior in high school, he began "hurting" himself. He had always been a good student but when he moved from Hamilton to Venice high, he suddenly started to hang out with the wrong people. He would go out every night with these people. He did things that were wrong and he almost didnt graduate. My parents and my grandparents were very dissapointed. He felt like a failure and he was depressed for many days. Fortunately he managed to rectify himself and graduate.