From the start of the snowfall, a certain category of dog owner seemed to think that the city’s so-called pooper scooper law — surely, the heart of the social contract — no longer applied. Or, as a sign taped to trees in one neighborhood scolded, in verbose lowercase type: “just because you are entitled and it’s cold does not mean it isn’t rude disgusting pathetic + illegal to leave your dog’s feces on the sidewalk.”