So we build semi-automomous free zones, where the infrastructure is essentialy indistructable,anyone can get a lockable secure space, and the violent sociopaths, are picked off. Facets from other proven models could include, a work for drunks program, like in some german areas, they get to clean the streets they hang out on, and are a sort of invisible "watch". Free "heroine" , for any and all who check into a controlled access facility. The real ferrals are just a fact, but are very easy to spot so the threat level is lower, but as they dont have adequate shelter, see point #1, they congregate in more southerly areas, and or, get into trouble trying to survive in northern areas. I have lived on the edge, for most of my life, seen a lot of wild things, in a lot of different places, and the story is that people just want to be seen and accepted, there, in the moment. Those moments are impossible to predict or create with any kind of predictability or repeatability. All ww can do is build the places, where that can happen, or not, and its "even", everybody can walk away, If nothing works, then there is the road, and that needs to be ok, and no one is a "vagrant" as they got a place to go. nobody is stuck.