A shrewd interview question

I'm surprised I don't hear more interviewers ask their guests, "What's the biggest misconception people have about you?"  Whether the guest is a politician, a musician, or an actor, it's usually a smart question to ask.  It allows a guest to set the record straight and vent, if necessary.  The interviewer, in turn, is more likely to get more honest, detailed answers for the rest of the interview than (s)he might have gotten otherwise.