We've been down this golden road before, but it's always worth remembering that one man's subway seat is another man's urinal. Here's recently uploaded documentation of an individual micturating on this fair city's subway seats, just as the train pulls into the station at Jay Street-MetroTech. The appalled witness who shot the video sums the scene up succinctly in one word: "Despicable."
Of course, it's easy to be a Monday morning urine-back and say the pisser should have at least had the courtesy to relieve himself between cars, but then he would have had to leave his bags unattended! And to his credit, the urinator doesn't exactly seem proud of his behavior, unlike some people who do this sort of thing for sport.