My father once told me a story when I was like 7 that when he was studying to become a JW before he got baptised demons came and were tapping on his apartment window all night to scare him away from continuing studying. This was the first time I remember ever thinking that paranormal entities actually existed, and it terrified me for weeks, I expected to see demons every time i looked out a window. Later on when I started critically thinking...I wondered why the demons would bother F-ing with my dad, since he was such an abusive ass, like...yeeeaaaaahhhh the JWs would missing SO MUCH if he was scared out of joining.
Then when we moved to a small town community up in northern Ontario and suddenly there were 'urban legends' about several specific possessed object JWs have come across; one sister bought a second-hand dress and everytime she wore it she would get a terrible fever and flu like symptoms causing her to miss meeting (LOL!), same with a pair of earings, and a second-hand couch that started making 'wierd' things happen in the house. The moral of these stories: Don't buy anything from garage sales or second-hand stores because anything owned by anyone who isnt a JW at any point could be possessed! Bahaha!
I've only heard of one storie where a JW couple actually full-on admited to seeing (whitnessing) a ghost/demon/wtvr; they moved into this apartment/house started unpacking their stuff, the next morning they wake to find some archiach coins (or coin) on the breakfast table. then they both reported seeing the spectre of half a man (the top half, legless) moving around the property on several occasions over the two or three days they stayed there. I never got anymore details or explanation regarding this tale, and I cant remember the couple now but I remember knowing who it was when I was told it happened.