You always hear how Self-harmers are "Emo" or an "Attention Seeker" but Self-harm isn't a joke, it takes a lot get to the point of turning mental pain into physical pain. When you sit there, and make fun of them, you're just making them pull down their sleeves, put on a pair of pants, and hide their skin even more, you're pushing them further and further into a hole, and if you don't be careful with what you say, thay hole will turn into their grave.