There are numerous detrimental consequences that can come out of being in this lying, corrupt, fear mongering apocalyptic religoius cult.
This truthful and exacting description alone should give some probable hints to that effect..
There is a long slew of psychological ills that come infused into someone's psychological and sociological state of mind.
Here's an example .......
When I was growing up as a JWS I happened to live close by the PO's son who was about my age. I was of course suppose to associate with other JWS and not any non-JWS so that's what happened and my parents of course approved.
This kid was the most hated kid in the neighborhood understandingly so since he would beat up any non JWS kids, spit on them, set the school on fire, break windows.
He had a very destructive attitude to anything deem worldly or anything not connected to the JWS religion. This no doubt was instigated by the WTS's propagation of this old worldly system things was going to be destroyed soon and all non -JWS were going to be destroyed as well.
The family eventually moved out of the area mostly because his PO father got caught committing adultery, he was DFed . Due to this embarrassment and troubling situation the father moved the family back to where he grew up some 600 miles away.
I was kind of thankful and relieved the son had moved away as well.