I am sure someone will correct me, but was there not a famous incident years ago that went something like this:
Player: "Ref, what would you do if I called you a Barsteward"?
Ref: "I would send you off"
Player: "What would you do if I only thought you were a barsteward"?
Ref: Nothing, you would only be thinking it"
Player: OK, I think you're a Barsteward"
.......cue red card
As I said, I am sure someone will be able to name names or simply confirm if this is an urban myth.