Hey now. I never said I believe it will happen. But I can hope. It certainly wouldnt be fun but i would rather have to kill somebody because they are deranged or mentally not there, than somebody who wants to kill me for territorial or political disputes. I can also hope that crazy things like dragons were to suddenly exist. This is entirely different from actually thinking it will or is ever possible.
Call it a morbid interest, but thinking of insane illogical things such as zombies is interesting. I also think of things like my position in a room if something were to happen, or plan of action if there were a fire, for example. Doesn't mean I expect a crazed gunman will come in any second to kill me, but I do enjoy thinking through the improbable. Its interesting, and sometimes fun.