I hate the walking dead. I watched like 5 episodes and it was really boring and dumb in my opinion. I mean, even if the apocalypse DID happen, it would only last like a week or two. The zombies would STILL be decomposing and falling apart each second. Whoops! There goes my arm!!
plus, zombies would have to choose between eating the human or increasing its population. They don't have intelligence so they'd obviously go for food and then zombies would end up destroying themselves. They would have no food because their whole purpose is to eat all human brains thus leaving them without any more humans to turn into zombies.