I'm not going to get into your other points. Covering point 1 isn't on topic.
Your point 5 tho, I will touch upon. There is nothing supernatural, demonic or unknown about "cutters". I have worked with people with this issue for almost 10 years. Many cutters have emotional issues due to abuse, and top it off with very poor coping skills. Cutting offers a physical pain to to take one's mind off the emotional pain that they are incapable of dealing with. Many times, time, maturity, and help with forming more appropriate coping skills alleviates the issue.
------------------ Asgara "An unexamined life is not worth living" Socrates via Plato