I have a habit, from my car driving days, of talking to other drivers (rather loudly). Typically commenting on their driving skill. This has carried a bit to my riding.
So, one day I am riding through a parking lot, in front of a store. Suddenly a cop car comes roaring up, and too cops run into the store. Customers are looking and talking. One guy takes a step into the crosswalk, then out, then in, turns, steps out... Geez!
So, I say rather loudly, "are you walking or dancing, sweetheart!" He immediately backs up, which is when I noticed my shield was up

--Dave