That's fine, but most people aren't. And we're obviously not talking about potheads. I don't think we can consider it a solution to say, "Allow those with unmanaged, addiction-related psychosis to live independently in crowded neighborhoods."

You wrote elsewhere about residential harm-reduction programs. As far as I can tell, the big impediments there are cost and staffing, though I'm curious what such programs cost other cities per resident per year. $30,000? $100,000? You'll quickly run into a lot of opposition as they become unaffordable.