Nuts to that. Where I live, a MWG call usually ends when the dispatcher asks if the MGW is causing trouble or harming anyone. If not, the caller is told to have a nice day and they hang up.
The only time a peace officer has approached me on the street was to discuss what I was carrying have a friendly argument about what constitutes a "real gun." I happen to like my SP101 for a carry gun, and lots of my deputy friends think I ought to go back to carrying the XD .45.
But yes... if a "cop" in a city starts to chat you up about the gun... look him in the eye and then walk away without a word. Conversations with "cops" are usually far more dangerous than loaded guns.