The article doesn't mention the diagnosis of "Personality disorder". This is a difficult and controversial diagnosis, but it's important for this kind of article.
We'll hear about people who don't take their meds (this thread has such comments) but these people aren't the main problem. People with a probable diagnosis of PD are the problem.
Some numbers from the mostly rural UK county of Gloucestershire:
Population is roughly 800,000 people. There are about 4,500 people on the books of specialist MH services at any time. There are about 2,000 people with a probably psychotic illness. There are about 2,500 people with a probably mood disorder. There are between 20,000 and 30,000 people with a probable personality disorder.
Looking at the psychotic and mood disorders, and putting it very simply, you hospitalise for a short time while you stabilise the illness and sort out the meds. Then you release the patient back to the community with intense support from community workers (daily, weekly, monthly visits). You give an easy route back into services when these people need it. You also provide vocational support - help people back into work and to integrate back into society.
Now look at what happens to people with a personality disorder. There's no real treatment. This used to mean they were specifically excluded from treatment - turned away from specialist MH services. That doesn't happen anymore, but there's not much that can be done. And behaviours are often much closer to "bad" than "mad", and so criminal justice is involved a lot more than MH services.
Here's a harrowing Grauniad article (http://www.theguardian.com/society/2008/mar/30/prisonsandpro...) (contains description of self harm and suicidal behaviour)
> On the day Diane Kent set herself on fire in her cell at Low Newton prison, County Durham, two months ago, she had already tried to hang herself twice and asked a prison officer to take away her lighter because she was scared of harming herself. According to incomplete prison records, her request was refused.
This woman's burns were so severe she was kept in a medically induced coma for 5 weeks.
Women who attempt suicide by arson are sometimes put in prison (http://www.oxfordmail.co.uk/news/8389188.Woman_locked_up_for...) for endangering life.
Here's another example, again traumatic reading. (http://www.theguardian.com/society/2008/feb/03/prisonsandpro...)
And this is in the UK where we have much better services than the US. God only knows what it's like over there.