I guess it proves the old expression of "what goes around, comes around." Jehovah's Witnesses are not the only ones trying to insulate themselves from the critics. Many fundamentalists have the same mind-set.
But in this case, I'm sure the two Jehovah's Witnesses felt that they were unfairly discriminated against for holding different views. And they probably protest the deletion of their names from the posting as unfair and unchristian. No matter that they do the same on their sites. Freedom of expression in the Watchtower Society only means that you are free to praise the organization. No criticism will be tolerated.