I can think of three cases where something like that happened, none involved JW's or the Watchtower in any capacity. JW's don't have a lock on bad behavior. The worst one was an employer who got in a fight with his sisters over an oceanfront vacation house. By the time I quit working for him they hadn't spoken to each other for at least a year.
I'm very thankful my siblings and I were able to settle our parent's estate without a fight. Mostly that is because Mom and Dad worked with a top notch estate lawyer, everything was settled before either one of them was even sick. There's a lesson in that.