I have AvPD and just got banned from the ASPD forum for arguing with them and disputing their medical orthodoxy and pedantry.
I got pissed off with people in BPD too for the same thing. I know that I'm obsessive about this because I have AvPD but I just get totally exasperated with trying to help people that won't even admit that they have a problem.
Now, here's the thing. If I go to a psychiatrist or a doctor I'll be too embarrased to admit that I'm insane and I'll just agree with him that I probably do have these traits but that they are quite normal, apart from the anxiety or depression that I could complain about as symptoms of what is actually a mood disorder. But it's just so easy to fob someone off with pills for those symptoms and they really do not treat the underlying problem.