^ Are you just jumping in, or are you creating some sort of initial rapport with the room? Whilst jumping in is generally the way of things in the more chatty, general rooms, I don't think you can just jump in with your issues in Room 4. Might also be an idea to say something like "I need some support with X issue, can someone talk?"
Otherwise, I agree with you. I think on a self-harm site people should expect that to be a topic of conversation/discussion.