According to the Zombie Research Society, May is the month in which many zombie-related films have been released, especially those they deem important to the evolution of zombies in modern media. Zombie Awareness Month even has its own ribbon, which is a fitting brain-matter gray.
The Zombie Research Society follows three basic principles:
2) The zombie pandemic is coming. It's not a matter of if, but a matter of when.
3) Enthusiastic debate about zombies is essential to the survival of the human race.
Given movies like I Am Legend, where it's not a true zombification, but some mass virus, I suppose that something like that could be plausible and make their principles somewhat realistic.
Unfortunately, I think we just recently had a thread about zombies in video games - someone claimed that there were too many games with zombies in it. After all, according to our own Zombie page here, there are 438 games with zombies in it. But can you truly ever have too many games or movies with zombies in them?
To wrap this all up - if you're a fan of zombies, or just worried about the Zombie Apocalypse, get out your gray ribbons, and wear them proudly.