I don't watch many crime shows (I just don't like live-action), and the shows I do watch typically steer clear of any and all mentions of mental illness. The ones I'm watching right now feature very obviously mentally ill characters, but even then they don't say a word, just that they're "psycho!"

But one thing that REALLY bothered me about one of the shows I'm watching, Mirai Nikki, wasn't what they said, rather it was the treatment of the mentally ill character in the show and what the fans of the show often say about her.
Her name is Gasai Yuno. You may have heard of her, as she's very famous in the anime community, being the most notable "yandere" character in mainstream anime. She's very emotionally unstable, she stalks a boy that she's "imprinted" on, and she's even killed people. So in the show, the boy is afraid of her and other "crazy" characters call her a psycho. In my opinion, she's one of the most villainized characters in the entire show, although there are a few that are worse than her; they just don't get as much screen time.
What REALLY bothered me about Yuno's treatment by the fans was many different people diagnosing her as borderline, and following that dx up with "otherwise known as 'psycho b***h syndrome.'" I've seen different variations of that posted various places, and it really pisses me off to the point that I'm obsessing over it.

Yes, Yuno does display very obvious and severe borderline traits, as well as antisocial traits, but that's no reason to call her a psycho b***h, right? I identify with Yuno a lot and seeing her treatment just makes me so sad, although her case is far worse than mine.

But hey, it's mainstream media, right? What else are they going to do with a borderline character?