I do understand that in many instances when a theist asks a question like the title in a recent Watching God post, "Should Christians Watch Horror Movies?", it is meant as a rhetorical device as it is a genuine inquiry. However, I find such questions to be by their nature ignorance laden. Anyone who values critical thinking should see just how foolish these questions tend to be. The answer is always what the theist asking prefers it to be. There are no definitive well founded answers. There cannot be any given the completely subjective amorphous nature of supernatural based concepts.
Paul Assay goes through the motions of reviewing some of the common reasons given for supporting or opposing watching Horror movies among Christians but it is notable that he never gets around to a rather obvious problem with allowing horror movies. They tend toward the absurd. If anyone among the theist crowd ever made a push to dismiss them on this point they run the risk of exposing their beloved religious beliefs to the same critique. That's a far larger problem than any of the others Assay does note.