It’s usually when they have gone off meds and are refusing to medicate themselves that it’s a good idea. You put them away, get them back on their medication and give the medication time to kick back in while professionals are there to help em.
Mentally ill people go off their meds because they want to feel 'normal.'
'Normal' to them is not in the realm of what the vast majority of the population considers normal.
The problem is that everybody is 'normal' unto themselves.
In short, crazy people enjoy being crazy. Every single minute of it.
Two astute observations I have read:
"Mentally ill people do not 'suffer' from mental illness. It's everybody who enters into their orbit that experience the suffering."
"Nobody is ever entirely in their right mind."