I would be far more worried about a robot uprising than a zombie apocalypse. A robot uprising seems a lot more likely to happen, for one. Especially with things like these [http://en.wikipedia.org/wiki/MQ-9_Reaper] on the rise. A zombie apocalypse, at least if we would be dealing with classic shamblers, wouldn't be all that difficult to cope with, I don't think. One of our primary advantages over the undead is that we are smarter than them. An advantage that we are not guaranteed in a robot uprising.