Back in the early '70s when my family was new in the twoof there was an elder who told us about what had happened in our congregation a few years earlier.
It seems that many in the congregation were having terrible demon troubles (he gave enough specific examples to prevent me from sleeping for days) so they called the Society. Mother quickly dispatched a SWAT team from the Service Department.
They met with the local brothers and told them that our little town (Waterville, Maine) was a known center of demon activity. For years there had been an annual witches' conference held there at some old hotel that had eventually burned down. Another known center of demon activity was Salem, Massachusetts (lending credence to the infamous witch hunt from centuries earlier).
In any case, the SWAT team told the local brothers that there were rules of war between the angels and the demons. One of them was that if there was a "demonized" item in the house it could be neutralized by moving it outside of the roofline of the home. This method could also be used as a test for a suspect item. Also, the demons could not read your thoughts, but they could take anything you said out loud and use it against you.
The sad thing about all of this silliness is that I later married this brother's son and became part of the madness. We had to live with them for a few months, and while we were there everyone in the family experienced some form of demon harassment. There was an unused shed on the property that eventually became so full of suspect items that they started using an old van for additional storage.
My ex-husband was full of stories about demon harassment that he had experienced. One time, his parents bought a bed from a Methodist minister, and during the night he got punched right through the mattress. His sister kept seeing shadowy figures moving just at the edge of her peripheral vision, but they'd disappear when she turned her head to look. Once they got rid of the bed all of the spooky stuff stopped.
Most of the time the "harassment" was just a heebie-jeebies feeling when walking past a room or suddenly waking because you heard your name shouted in your ear.
Of course, something he left out of that story was that their father was a violent man who frequently woke his children by beating them for whatever naughty things they'd done during the day. My guess is that the punch through the mattress was his father hitting him while he slept. The sister had a vivid imagination.
Living with a man so indoctrinated with this demon mythology came at a cost. Twice during the course of our 27-year marriage we had to get rid of all of our furniture, old photos, and other stuff that had come from questionable relatives. Usually, the reason he suspected the demons was that he and I were upset with each other or had an unresolvable issue.
Since leaving him and the organization I haven't had a single incidence of demon harassment even though I'm a mentally diseased apostate.