I don't ever discuss who is in the audience, not before, during, or after the performance. Yes, there are actors who don't want to know, but it's mostly because I don't care. I am not the least bit celebrity-struck, am unfamiliar with most pop-culture icons, and know that theatre people, even prominent ones, are just people like me. All of these folk should be able to come to the theatre, enjoy it like any other audience member, and go home without being disturbed, if that's what they desire. (Plus, I don't recognize anyone, pretty much no matter how famous, unless someone else point them out to me.)