I don't know what you mean, it very clearly works, because in every homeless infested city, there are neighborhoods that are significantly cleaner and have far less homeless people.

No fucking shit.

One: It takes time for this process to play out.

Two: Most cities just take the shithead approach of pushing all the homeless people into the poorest neighborhoods. (And no, even if you don't give a shit about the poor, this still makes the problem worse.)

Pushing homeless people out of my neighborhood does not make it shittier..

Hostile architecture does.

I have literally no clue what you're talking about

That much was obvious several comments ago.

I live in SF right now and my neighborhood is nearly free from homeless.

Won't be for long if you keep cheering on these solutions.