'But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, ... or an idolater, ... or an extortioner; with such an one no not to eat.' 1 Cor 5:11 KJV Bible.
Some Jehovah's Witnesses say that disfellowshipping is a form of extortion. This was condemned by the Apostle Paul. They say that their religion is abusing their authority as spiritual teachers to take what doesn't belong to them. i.e. Families and close relationships.
Everyone is held hostage until the disfellowshipped person repents and gets reinstated. Disfellowshipping and shunning motivates some disfellowshipped Jehovah's Witnesses to admit guilt and return to the organization.
Disfellowshipping can whip some people into submission. Stress, depression, sadness, and a feeling of hopelessness, can lead to Mental Illness for disfellowshipped persons and their loved ones inside the organization who are also grieving over the loss of a mother, father, child, brother, sister, close relative, or friend.
Jesus warned his followers against the leaven of the Pharisees. The Apostle Paul claimed to be a Pharisee after converting to Christianity. Acts 23:6 See Facts About The Apostle Paul