Re: Informal, unscientific survey
Never. My brother was once given a ticket by USCG while out working on his clamboat. The ticket, written by an apparent 15 year-old, was for a dirty air breather element (Royal 8, updraft). It was not dirty. That said, it's the only time I've ever heard of a silly move by CG for whom I have great respect.
Alberg 35: With a philosophical flourish Cato throws himself upon his sword; I quietly take to the ship.