The term "Broken Windows" is a metaphor used to describe a certain situation, that is, if a window is broken in a house and left unrepaired, people passing by will come to the conclusion that nobody "gives a damn" about the house and the area is fair game, there is nobody in or it is not well looked after. That is why I presume that there is not only a single-window broken in most areas, especially in the estates. It either multiple windows were broken or not at all, i.e. "all or nothing". It is thought that "Former New York City Mayor Rudolph Giuliani adopted the Broken Windows Theory and implemented a community-policing strategy focused on order maintenance". The mayor had a zero crime policy and cleaned up areas nightly regularly; hence they had clean walls, which were clean of graffiti, waste, urine, rubbish, and areas were clean of hustlers, prostitutes, criminals, etc. And people who committed minor, negligible crimes were arrested a