I have mixed feelings about the shunning thing. What if all of those people jumped now and thousands upon thousands were suddenly faced with having to shun loved ones immediately. I wonder how many it would wake up to the ugliness that they're really involved in.
Then again, whether as presently constituted or if shunning were done away with the doctrine and culture dehumanizes those that leave to an extent that most would probably react no differently. It's a fascinating topic. It also gets into the nature of belief and how it often exists against all evidence.