Thats a very propertarian view of a non-propertarian issue. You have what you use. What you don’t, you don’t. If you leave your house vacant for too long a period of time, then somebody might take up residence. But if people don’t just move into your home while you’re on vacation now, why would they in a hypothetical system where the concept of property is radically different and presumably everybody has a home? Unless you’re talking about second homes? Because that’s a non starter. Nobody needs more than one home.