It reminds me of the old joke, where the physicist solves a farmer's chicken problem... but it only works for spherical chickens in a vacuum. The physicist should have accounted for nonrandom zombie behaviors, specifically, their attraction to noises, lights, and movement. Thus, a random walker model does not accurately represent the behavior of a zombie.
0p3rati0n said:
Fuck science! I say go to your nearest skyscraper and camp out there and snipe the decaying bastards. Assuming zombies won't figure out how to operate an elevator then your good. As long as you plant claymores in the stair well.
Simply destroying staircases in some way is a better choice. Once that is done, skyscrapers are impenetrable fortresses. Unless enough of them show up that they manage to clamber up eachother to get into the second or third floor...