Maybe we should be prepared to state our case ,when we believe that our point of view is valid,whoever the focus of our disagreement is?
Seems to me that you should be as likely to take someone up on their perceived error if they are famous,hold positions of power,or just a no body like me.
It seems a prerequisite of the potential bully that they need to ascertain the status of the one they disagree with prior to engaging.
Its a discussion forum and not a job interview.