Simon: Everyone has the right to shun whoever they want.
The operative word here is want. How many JWs are shunning their relatives because they truly want to and not because they feel pressured and coerced to? You seem to be oblivious to the difference between an individual choosing of his own free will to shun someone they view as toxic; and an organization mandating and stirring up its members to shun others with the threat of consequences if they fail to comply. Everyone is free to have sex with anyone of legal age that they wish to. So would it be ok for an organization to mandate its members to make sexual advances to a certain segment of society, with the threat of consequences if the members don't comply? Surely you see the difference between an individual's free choice and them being coerced by an authority into taking an unpleasant action they likely would not do on their own?