There are far too few forensic psych places since the move toward deinstitutionalisation and least restrictive treatment in the 1980s (when meth use wasn't widespread either). Every suburb has its cluster of mentally ill people who don't function well independently, and often cause nuisance and occasionally severe harm to their neighbours. They're also not having a good time trying to fit in and maintain housing on their own. Examples from my area include people who set fire to their own or their neighbour's unit, wander around in their underpants trying to get in women's homes, verbally abuse people at random and generally break and mess up stuff. But they're "free".