> I do not live in one of the cities that have issues with a large homeless population, so the experience is a bit lost on me

That's the key experience you're missing. If you've never lived in a high-homeless/drug abuse area, you don't really understand how thoroughly draining it is on every aspect of civic life.

I recognize that I'm missing that part of the context, but it still surprises me that the answer to that is relatively global surveillance. In the current state of things, homelessness is perfectly public and observable, right? And so at any point now, the proposed "enforcement" could take place without the need for cameras? I think that part is unclear to me as well, the problem that exists that this solves.