First, I have never been a Jehovah's Witness, and this really is a true story.
When we first moved into our house, there were some rather strange events, I kept feeling like someone was behind me, and seeing things move out of the corners of my eyes, felt "unseen" things brushing up against my legs, and my stepdaughter went to stay at a friends house one night when we were gone because she felt she wasn't alone in the house.
My husband is NO longer a witness, but he told me that according to THEIR religious beliefs, there are no such things as ghosts or spirits, but demons will "emulate" ghosts--humoring him, I asked how we could get rid of demons, and he said that according to JW belief, demons can not stand the name "Jehovah", and that they could be driven out by saying the name "Jehovah" 3 times out loud.
Then, one night, while still sleeping, my husband sat up in bed and started talking to someone who wasn't there, but he kept referring to a "red hat", and asking what he was doing in our bedroom. My stepdaughter then told me she had seen someone in a red hat also.
I really was freaked, and figured, what could it hurt? So after everyone had left the next day and I was alone in the house, I went into each room and said "Jehovah" loudly 3 times, and repeated the process in each room 3 times. I didn't tell my husband or stepdaughters I had done it either.
That ended the strange occurances...really, I'm not joking.