I don't want to talk to a depressed self-harming attention seeker
Why would you not even want to help them?
It would be stupid to talk to someone who is just trying to get attention by cutting herself.
People who are cutters need genuine help and you need to be more understanding. You should be understanding of those with psychological issues or you will find that you don't have others who are understanding of you when you have problems.
I still think they are attention whore and self-centered, they are just selfish people.
I think that you should try to help them though. It is not okay to abandon someone when they really need you.