Shunning is not a Christian way of doing things . Paul does say not to eat with Christian's who go wrong. This probably means do not share the Bread and Wine with them as this was commonly done during a shared meal .
As far as l am aware it doesn't say anywhere in the Bible to treat such people like lepers .
The WT simply uses this tactic to control it's members .
False prophecies , flip flops on doctrine , as has already been said there is too much to mention .
Jan