All though NYC drones would not be armed with guns and be quite small here is a theoretical.
Even a small drone could have a compartment with "gas" to knock out protestors. The NYPD could send a gaggle of drones over protestors and drop gas on them to knock them out and than mass arrest them. They would not have any resisting arrests! The potential of drones to "police" or spy on New Yorkers is shocking and scary because the Michael Premo case proved the NYPD will do what ever it takes to not share video that exposes they are lying and framing innocent New Yorkers.
Follow the link to the Manhattan DA's role trying to protect corrupt cops in the Premo case.
Domain would be TARU on steriods and throw in Drones and a new level for NYPD to have destroy evidence that incriminates them.