Clearly laws are there in case they need to be enforced. Lot of laws are there "in case". However in this case the community seems okay with it for a couple decades. Clearly these new people come in and think they run the neighborhood but neither the cops nor the city sees the need to enforce "the law" if it's only disruptive to a couple of gentrifiers moving in trying to continue the tradition of white imperialism to subdue local culture.