Yeah, there was Tony Collins, Jim Schoenfeld the hockey player. No scripture on how to deal with celebrities other than "no respect of persons". There were no celebs when the bible was written. Jesus was really the first celebrity who wasn't royalty or military. The people who murdered him certainly weren't respecters of persons lol.
As for JWs, I personally have never been in a discussion with one which didn't turn into an argument. Romans says as much as possible live peaceable with all, but it's not always possible.