At LAX (T6), I was told that I was the only person to use the checkpoint in four hours. Perhaps it was because I had and endless battle with the "Maroon Coat" that I did have access to PreCheck. I think he was under the impression that it was an employee line.

I joked with the TSA staff and asked if they wanted me to go through a few times with different outfits. They said, "Only if you bring doughnuts." Fair enough.