I find that all mental illness gets treated as if it's fake by a vast majority of people. I think the only ones that are less stigmatized are actually schizophrenia and autism, and I think that's because both of those manifest themselves very clearly as something else and end up in the news.

I have heard more than one comedian make fun of bipolar as "today I'm happy, now I'm sad. I must have bipolar." It's really annoying because there is a lot more to it than that.