I really, really like this kind of idea, and I feel it a natural evolution of the game. I think (and hope) that there will eventually be a stage where people band together and 'own' a town, set up a governing hierarchy and even start specialising as bartering merchants or hoarders. The Zombies would always have to be guarded against, but you should be able to clear it out and then settle in it, even build a community. I just have this semi-erotic fantasy of seeing a town, walking up to the outskirts and a guy in a tower aiming a gun at me and saying "What say you outsider?" and looking inside and seeing people walking around and not always about to kill each other, but like bartering goods or building structures. Oh and being like the mayor of a city and sending scout parties out on other towns rich with loot and then setting up a strategic assault complete with Humvees and helicopters... Of course, you would eventually end up having totally dominated servers...but it would be kinda cool to take evolutionary gameplay to whole new leaps and bounds. Imagine a player-created economy where like the currency is beans or something..The possibilities are endless, and I think I've just been talking to myself for a while. Maybe this idea would probably be better off when ArmA 3 comes out as won't that have every building enterable?