" If crime is concentrated on a few percent of the city streets,” Weisburd asked, “why the hell are you wasting resources everywhere? If it’s coupled to those places and doesn’t move easily, even more so.” The coupling theorists believed they had solved the problem that had so confounded the earlier days of preventive patrol. How do you effectively patrol a vast urban area with a few hundred police officers? Not by hiring more police officers, or by turning the entire city into a surveillance state. You do it by zeroing in on those few specific places where all the crime is. "

― Malcolm Gladwell , Talking to Strangers: What We Should Know About the People We Don’t Know