Hold on. Since when do rights keep things from being stolen? Rights are nothing but the law's bizarre form of self-justification through an appeal to God. I don't know about you, but I'm pretty sure I've never been stopped from stealing something by a "right." There are lots of ways I've been stopped from stealing which could (and I imagine would) be used by a commune to keep things from walking away: fences, boxes, hiding places, locks, weapons, keeping guard, fear, respect, burial... Anyway, it seems better to have preventive measures than to try to run across the world (which way? on what information? at what risk?) trying to get some food or a car back from somebody who might be long gone. Although, come to think of it, tracking would be a badass skill to have ATR.