Just a note on a comment above, where this should be posted. Actually this is exactly the right place to post such things, as a specially designated forum for adult and sensitive topics.
In my opinion self harming is looked down upon for a few reasons:
It is seen by many as a weakness. This is normally by those who misunderstand, especially those who are strong willed. Because they can't understand it, the don't like it.
Secondly, to many it is distressful. It is in nearly all animals nature to become distressed at the sign of injury. Compounded with the fact that generally the person you find out about is someone you care about, and it is perfectly understandable for them to become upset at the action. They don't want to see you hurt.
Finally, the general public knowledge for underlying cause of this is a mental disorder. To many this is again a very uncomfortable subject.
So the combination of the above explains why many react the way they do. In most cases only those who have experienced it themselves, or have read thoroughly on the subject have more understanding.
As to whether I think it is a good idea? In general, no but I understand why people do it. Doing it in most cases suggests distress or some other underlying cause, and that needs resolving rather than masking through application of pain.
The only exception (and one I have done) is through BDSM, where it is done purely for the sensation / pleasure. However I would recommend all those doing it to figure out a safe way, whilst I don't regret my foray into pain / bloodplay, it has left me with some scars. That was embarrassing explaining to my parents! Play safe people
