Sir I would never laugh at another man doing his damnedest to protect himself and his own. I may not agree that citys are viable but hey how many times have I lived through the end of the world? LOLI believe our local Fortress plan (although obviously untested) combines the best of all theories. Unfortunately, it's heavily dependent on your location, your relationships with those around you, and being generally unselfish. Laugh if you want, I still think it'll work.
You might have something viable there that people have over looked.
By all means start a thread I would love to read it. Who knows you could save a lot of lives!