It's gonna be "great" until the first backpack or pipe bomb blows up, shrapnel kills some kids and their parents sue because NYC didn't do like every other terrorism-experienced city and install clear plastic bag receptacles that are basically just an aluminum ring suspended in the air and emptied frequently. An example would be like: London's Victoria Station (when I last visited).
A metal container + rapidly expanding gas = shrapnel. Those decorative concrete and stone trash bins are especially vulnerable to large explosives placed in them..