It is a problem if, no matter where someone is, they are always asked to leave that place. At that point you cannot special-plead the subway system.
I would sometimes sleep in my car in a completely empty parking garage, bothering no one, and then some dickhead cop or security guard would beat on my window to demand I not sleep and leave immediately.
I would sometimes sleep in my car in a completely empty parking garage, bothering no one, and then some dickhead cop or security guard would beat on my window to demand I not sleep and leave immediately.