Cognac,
It would also be interesting to think about the shunning enforcement, under which circumstances SHOULD not speaking to someone apply as compared to the rules enforced by the Watchtower leaders.
Excommunication does not need to lead to the shunning that JW's are told to do. My understanding is that the only ones to avoid greeting were those attempting to introduce a false teaching into the congregation. It seems that other Bible-based religions are closer to the spirit of what the Bible says when they withhold privileges and sacraments, but hardly any religions enforce shunning to the point of even removing those who say a greeting to former members and to the point of cutting off their family members.