the way i see it, there are 3 classes of zombies
Parasitic Zombies (infected by a parasite)
Diseased Zombies (infected by a virus)
Demonic Zombies (pure evil as $#!^)
we’d rather deal with parasitic zombies because there is less of a chance to become "infected". The possibility of the parasites sharing a hive
mind is not very realistic and i am skeptical of how much control a smaller parasite could have over a human being.
Diseased "zombies" (dead or undead) can get ugly depending on the means by which the disease is transmitted. They might be fast at first but they
will become slow. I'm going to assume they'll be intellectually slow as well.
Overall i'd say that demonic zombies are the worste; mostly because they are faster and smarter than the other zombies. Not to mention, i can't
think of many ways to thwart a demonic zombie uprising . . .
For all classes of zombies you need to take into consideration whether or not they can convert animals into zombies. Animal zombies are a pain in the
@^$.
What about zombie insects?! better have a lot of bug spray . . .
[edit on 5/14/2009 by JPhish]