I had a ridiculous conversation out in service once with a Ministerial Servant, 2 elders, and my wife. I brought up the topic because I had heard a group of crazy pioneer sisters talking about not doing yard sales because you never know what is linked to demons.
I asked the group what their thoughts were on it. They were all adament that you should steer clear of 2nd hand items. And these were some of the more logical witnesses I knew.
So I pull out my phone and go to the Insight book and read it to the group:
Insight Book under the topic DEMONS: http://wol.jw.org/en/wol/pc/r1/lp-e/1200271624/14/0
"Though evidently restrained from materializing, they still have great power and influence over the minds and lives of men, even having the ability to enter into and possess humans and animals, and the facts show that they also use inanimate things such as houses, fetishes, and charms.—Mt 12:43-45; Lu 8:27-33; see DEMON POSSESSION."
I then read the two reference scriptures. The reference to "houses" was talking about a person, not a literal house. There was no mention of fetishes or charms. Hence, there were no "facts" to show anything. I then asked them their opinion. Then they started with the stories that they heard.
I said "That is fine. You can choose to believe the stories but normally we just go by what the scriptures say, and I don't see anything about possessing anything other than people."