I was responding to what I took to be your full claim, which seemed to cover restricting movement as well as these two measures. (That's why my first question was whether I was understanding the full claim correctly.) I agree that closing or marking off park benches probably doesn't have much effect, but I don't know; but I think restricting movement and closing public spaces where people stay relatively still for an extended time (as opposed to, for example, trails on which people walk or run) do have an effect.
> But we know it doesn't because people still go to grocery stores without wearing masks or taking any other precautions and cases are dropping rapidly.
Not in the non-New York US! I admitted up front, and hasten to say again, that I am speaking from a US-centric perspective.