I never really had any studies to speak of, but my parents did have many over the years, and every single one of them was batsh!t crazy in some way. There was one lady we kids affectionately termed "Dirty Robin" (her name was Robin) and yes, she was very dirty. Her kids were filthy and rarely wore clothes. My parents were dumb enough to let her in our house and she stole from us. She was dumber than a rock, but she played them, so who was the dumb one in the end?
There was a couple on the same block as "Dirty Robin" who had demons. The wife was suicidal. I remember seeing things move in the house as a kid. It was super creepy in there and the people were super weird.
One study my dad had would be naked sometimes when my dad would arrive. Another woman professed to have written many popular songs of Elvis and others and lived in nasty little apartment with her name and "songwriter" under it on a plaque on the door. She told my mom that we were such well behaved kids, so did she tie us in chairs when we were little? Sure, seems like a logical conclusion, lol.
A few studies got deported, but I believe there were criminal circumstances that led to that. There were a few nice people that never took any of it really seriously but enjoyed the social aspect.
So many years, so many hours spent, and not one person ever came into the religion. So many crazies did come into our lives though. How about you?