JWs have been made to be very superstitious. Satan is such a huge object of fear in the JW mind that he is almost a secondary god in the pantheon that must be taken into appeased so as not to draw his wrath: "don't pray aloud your weaknesses, Satan will hear it and use it against you. Don't watch that book, movie, tv show, otherwise the demons will think you are interested in them."
Often, a scary story is crafted to invoke fear, as it is designed to do. Sometimes that mere emotion is equated with demons.
I remember at a Circuit Assembly one experience was given of giving up reading Agatha Christie mystery novels. Afterward, a friend who also read Agatha Christie had a nightmare that night. Of course, the only logical explanation: DEMONS! He gave up reading Agatha Christie.