Where I disagree with Simon is that the Government should try to do something about the fact that groups preach people to shun the disfellowshipped ones and threaten their members with the same treatment if they don't do as they're told.
I'm forever amazed that people don't think through the practicalities or consequences of government enforced association. I don't want to live in such a dystopian world.
Don't look at what you think the law provides as a benefit, to us. Look at how such a rule could be used, and misused, in its entirety.
Yes, they can shun us ... but maybe we want to shun them. Laws work both ways. What is the plan when uncle government is there with guns to make sure mommy and poppy cray-cray can have some me-time with the kids to tell them about the "one true religion"?
Be careful what you wish for, you might just get it.