Terry, I don't think it is silly at all, I think it is brilliant! It would be great if as many df'd members of JWN as possible tried this, and reported back on how they get on. I'm sure there was a df'd guy a year or two back either on JWN or youtube, (I can't remember where I saw it), who went to his memorial deliberately chatting to all the bros and sisters shaking hands and refusing to be ignored. It totally threw them, but he had quite a positive response from some, quite surprisingly, if I remember rightly.
There is no law against talking to people and they can only df someone once! I can just see some of the die hard dubs running for the exits in fear of contamination, but at the end of the day what could the elders do about it? They can't throw you out or call the police just because you are being friendly and chatty with everyone!!
It would take some courage and maybe some would not be able to face it, but I am sure there are many who could do as you suggest, and treat their df as a silly joke on the part of the elders! Maybe a campagn could be started, with the backing of everyone on JWN