Very interesting, but a bit naive of the Pastor and his church.
Of course, the Witnesses are a lot more legally savvy than this church. By not publicly revealing the 'sin' for which people are disfellowshipped, they avoid legal liability. And by treating disassociation just like disfellowshipping, they attempt to keep control over people even if they resign their membership
Well, in my experience anyway, the jws don't make it public, but they do gossip about it in the kh.