Had a lady tell us that she was close personal friends with one of our captains. I told her they must not be that close since he was now, and had been, a deputy chief for a couple years. Took a bit of the wind from her sails.
When she filed her IA complaint alleging rudeness, I pointed out that if I called the Deputy Chief a captain I am pretty sure he would correct me in an even more abrupt manner. They seemed good with that.