zombies are creatures usually portrayed as either reanimated corpses or mindless human beings, in both cases cannibalistic. While zombie films generally fall into the horror genre, some cross over into other genres, such as comedy, science fiction, thriller, or romance. Distinct sub-genres have evolved, such as the "zombie comedy" or the "zombie apocalypse". Zombies are distinct from ghosts, ghouls or vampires, so this list does not include films devoted to these types of undead.

They can be entertaining for the viewers who like to watch this stuff but for others who are afraid of suck kinds can find these movies really bloody and scary.
It depends on person to person to consider it on which state!!