"Enforcement of belief through a communal excommunication format".
What I've found about many who come back or stay in. They learn to live a double life which is common among JW's
They also come back because of being held hostage, missing family members who shunn them, or they their need help. Being held hostage by fear is not living authentically or honest.
I bet if one really has an honest, non judgemental conversation with the ones who came back, a whole other story will unfold.