How about putting up gates so people can't camp at the bottom of the stairwells and shit all over them?
If if there's not desire to lock them out... put in some bathrooms.
Seems like common sense, what am I missing.
Maybe crowd source the watching of the video cameras at night, and offer a reward to anyone reporting this kind of activity so that it can be ticketed and cleaned up?
Ticketed? I'm not sure you realize who is doing the shitting.
One of the richest cities in America can't even install (and maintain!) 24/7 public bathrooms.
We should do it like they do in eastern europe, such as prague, where you have to pay a certain amount of cents and they stay pretty clean.