How's this? I'm a fellow human being who was genuinely looking for advice and you broke the ice with "keep your mouth shut". I can't help but notice the other responses that didn't include that phrase. Huh.
Anyway, I agree with the discretion remark. Which is why I seeked out and asked a group of fellow appraisers the question, not the public at large. I haven't disclosed anything more than a general summary of the situation to anyone, and nothing's on paper yet.
And, for the record, I think it's a completely fair question. There isn't a real estate agent in the world that wouldn't find a way to tell potential buyers that the most-loved person in Detroit lives next door. I agree with people who say that a measurable difference would be impossible to nail down (it would be), but we mention a lot of features in an appraisal for which a value may not be measurable, but are certainly selling points. Wouldn't living in a neighborhood populated by famous people be a selling point? Or do people buying in that price range pretty much accept that as a given?