Hell no, I don't think zombies will rise up. But, I do believe in being prepared.
Whatever the reason behind it, folks are taking it upon themselves to think of a "worse case scenario", and try to mentally, physically and emotionally prepare for it. That's a good thing. Means there will be less victims and more heroes. Guys and gals thinking ahead, getting some good gear, and learning how to use it, nothing wrong with that, no matter what the charging factor is.
And, I think zombies are fun as hell. Its a good backdrop to a good survival base, learn to deal with zombies, and pretty much you can be prepared for most bad situations.
Moose