I haven't actually taken this on a different tangent. You literally wrote that you would only institutionalize those with a mental illness that is in the DSM, when questioned you said only certain illnesses would apply, so now I'm asking what illnesses and disorders you believe apply.

There are a group of people in Australia called Ferals. They don't eat well, and they never bathe. They do it out of choice. I'm sure some of them are mentally ill. I wouldn't be locking them up in an institution!