When I look back into era when I conducted bible studies I recall several nice people, but also weird and strange. My last bible study was with couple who were the new capitalists; people who earned a lot of money often by illegal means. I am sure they were dangerous, but I have not perceived that way. The couple eventually helped me to move away from WT cult, and was able to get a job through them in international corporation that was opening office in the capital city. I stayed friends with them for couple years afterwards. I kind feel funny now when I told to them that Armageddon will be arriving shortly. That was more than 20 years ago.
I also conducted study with politically active Nazi sympathizer. His family were right wing extremists where grandpa was a member of Slovak Nazi guard or SS unit during WWII. I felt rather uneasy to deal with self confessed Jew-hater, and I ended the study. The most beneficial study I had was with my Jewish coworker. It started accidentally as I was careful never discuss religion with people I work(ed). Once in the local business trip, we due weather ended in small countryside monastery take cover from the reign. There was a mass, and I and my Jewish coworker stroke conversation on religion. We eventually studied together and he brought me several interesting, antiquated books on OT. Nevertheless, we did not get anything and my elder told me that Jews are cursed and thus condemned to die in Armageddon. Several people in my KH had deep antisemitic convictions as the Nazi guy I studied at the same time and shared their universal dislike toward Jews.
To you, who was the strangest person you ever studied Bible/WT publication with?