You can tell when the Mayor has given the NYPD orders to increase their revenue stream. From Brownstoner:
My husband was IMing and having a beer last night on our stoop after Biden's speech...NYPD roll up in a patrol car and busted him for an open container violation for 25 bucks...he was very polite and told the NYPD he was appreciative of their presence, but asked asked about the public/private space concept, and he explained that if I was behind a fence or gate I would be ok. Since we don't have a gate, the set-back from the sidewalk didn't matter.
Better not sit on any milk crates within sight of the boys in blue.