this is why, when a previous commenter said that the MTA does a fairly good job, I (mostly) agree.

it's in large part that no other system in the world has to deal with asshole people like littering, graffitiing, cursing, spitting, eating, puking, defecating, pissing, smoking, injecting, vandalizing, mentally unstable, poor, homeless, rude, inconsiderate, 24/7, blase, New Yorkers