Personally, I think this case is doomed to fail.
Members will claim that they shun of their own free will. The Organization will say JWs are complying with scripture, not with their directions. Besides, who has the right to tell members they cannot ignore someone or insist that they at least say a greeting to people they do not wish to greet. Ex-members can not force friends and family to love them in the ways that they wish.
Case closed (IMHO)