Meh, I think in a anarchistic society peopler would naturally combine to protect what is theirs, after all they still want the finer things in life. Some might prefer to live purely 'off the land' but they would be no threat to society. Sort of like a MAD MAX scenario where the good guys eventually win out. I know thats just Hollywood, but then dont 99% of Americans think Hollywood is real? (sorry ;) couldnt resist that jibe). I reckon a country could be made to be almost self sufficient except for a couple of products like FMU, no harm to an Anarchy using a common market, just sort of like trading eggs for bread.
Anyway, I'm just dribbling nonsense for the sake of it. Anyone who has had a course of steroids will understand where my head is, lol, or any sulphate freaks.