That nonsense about things being possessed by demons has caused a lot of resentments from me too. I gave all my Engineering books and notebooks (with every single problem in the book beautifully solved; the best reference he could have used) to my JW nephew. That's gold for any Engineering student. Guess what they did with them. Yep, thrown away because of since the books came from the homosexual apostate of an uncle.
I have heard countless stupid stories about JWs doing all kinds of disregard for things that they don't know (or make up) their origin.
No matter what it is or what kind of explanation they give you. It's always nonsense.