That article was meant as a spoof.
This whole zombie apocalypse thing is another way for people to make money. Just like all this "end of the world" crap is nothing but a way for people to make money. They sell the fear, people go out and stock up on weapons, ammo, food, bunkers, etc. It's an industry...nothing more. Just like the world-ending topic, zombie apocalypse is also a hot topic which has been going on for a while and people are capitalizing off of it.