Auggie, thanks for posting that article. It addressed some of my questions. However, in this statement of yours:
"Anyone with a mental illness diagnosis should surrender all of their constitutional rights, right now, rather than at all compromise the right to bear arms of self-declared sane people."
I think you're painting the issue with a broad brush, doing a disservice to the mentally ill. There are many types and many degrees of mental illness. My sister had 3 different diagnoses but none of them would require her surrendering her constitutional rights (especially being eligible for insurance and other medical help).
As for being institutionalized, I don't know if you're aware that those institutions treat the mentally ill until they're stabilized with meds, and then turn them out. They don't have the room nor funds to do much else.
<-----I'M TOTES ROLLING MY EYES