Stop Hurting Yourself Sign

The meaning of the sign "Stop Hurting Yourself" in my interpretation means that we should stop hurting ourselves doing things that aren't good for us and that can affect us other than in our personal lives and that we hurt ourselves often than we think. I think Mr. Hsu put it there so we can see it and think about if we are hurting ourselves and if we are to stop because it isn't good for us. A student can hurt himself when they do something like take a breakup too seriously because then that's the only thing they can think of. It can affect them because they might distance themselves from their friends and in the end the friends may feel guilty thinking they could've helped their friend but didn't do it. In the end the person will hurt themselves and others and then they'll regret not talking about it with their friends which will hurt both them and the friends.