Depression and anxiety are really much more common than people believe, but the notion that they're "just part of one's personality" pisses me off, quite frankly. Being depressed sucks donkey balls, and I wouldn't wish it on anyone. And people who go around with the whole, "well, why do you take pills -- it'll just change your personality?" have no business commenting, because they don't know jackshit about mental illness.
But it shouldn't be used as an excuse to be a dick. If you truely, surely, can't be expected to follow the rules because of your illness, and if you're so far gone that you can't be held responsible for your actions, then you have no business going around unsupervised. And those people I truely, deeply feel sorry for.
If you CAN control your actions, however, you can't just say, "well, I can't help it, I'm sick!" And especially don't try and speak for others -- "they can't help it, they're depressed/anxious/blah blah blah" when said person didn't even ASK for your help, or even said specifically, they didn't want special treatment. I've seen this too -- someone mentions that they have a mental illness, or they're autistic, or whatever, but they say, "hey, I don't want special rules, I want to be treated like everyone else", and some SJW thinks otherwise.
That's part of the problem. Compassion is one thing and understanding is one thing. Being patronizing, or using it to try and get pity, or get out of trouble -- you're a douchebag.
And also, when people talk about autism and "quirkyness", then freak out at parents who express a wish for a cure, they really need to be more aware of people farther down on the spectrem. Non-verbal, throwing things, self-harming, screaming, etc. It's rare, but it's scary. And to claim that's just "being quirky", well....fuck you very much.
(Sadly though, it's not always easy to get help, at least with our fucked up healthcare system. THAT is for a totally different thread, though)