Pantsless on the Subway

The recent AP News Story "8 Nabbed for No Pants Subway Ride in N.Y." raises a very important question: are there people who actually wear pants on the subway? Sickos!
The story, though, claims that "160 people participated in the fifth annual No Pants Subway Ride...". Now, I would think the people who organized this event have never seen the average New York subway rider....but there have been 4 previous "no pants" rides! I mean, how is the No Pants Subway Ride a success to the point where it warrants 4 sequels?
These are the questions that keep me up at night.