Elsewhere - I agree with you, the title can be used and cannot be taken away. You can say whatever you want or call yourself whatever you want. You can change your legal name to become - first name Jehovah's and last name Witness. They would not be able to force you to change it.
My confusion with respect to this thread is that it appears that people want to use the courts to pursue claims or actions against JWs for being df'd or da'd. That is impractical and would clog up the judicial system more then it already is clogged up. As for libel and slander, people have a tendency to throw those words around to freely. It is much harder to prove. I think the average person have an unrealistic view of the judicial system and how it works in the US.