If I hire a manager and security guards, and they start to try to rule me they would be fired. I once worked as a bouncer. I mouthed off to the owner, I would have had a bad day and so would the night club superviser had he decided to act badass.
If everybody respected and helped enforced the NAP all the sudden, people would be free to move around. People who tried to imprison kids, wives, combinations of the two, etc. would have a bad day when caught.
I never said I would live in a closed neighborhood if there was anarchy, I am a industrial farm/factory out of the way sort of dude. The closed comunities thing lets Anarcho Socialist, seperatists*, and other wacky racers I have no wish to asociate with, somewhere to live while they evolve. I am sure some people want to live in kid free zones, family freindly places, singles places etc. because they do right now. With Anarchy there is no reason those things would disappear.
*When I say seperatist I mean racists of all stripes, gay bashers, that sort of thing. Many Anarchist think this sort of stupidity would somehow disappear in a "good" anarchy. I don't.