I said much the same to my lovely wife during the show last night.
Walking Dead is an interesting character driven show, with zombies as the McGuffin.
Other Zombie movies are more of a "OMG! Zombies! Chase Chase Chase" -type trope, with some scares and blood thrown in.
I like "Fear" because we're presented with some horribly flawed characters. They've no idea what's going on (though we do) and they're trying to figure out ways to cope with it. Not much chasing. Not many zombies. I imagine we'll see more character development, but right now the show is more about the surroundings and events.
But these fortifications will serve as traps. Surrounded by millions of dead as supplies run out.