I’m not saying drones are the answer, but it is not by any means a totally harmless event.
For those downvoting who don’t want to accept reality, below is an article from just a few days ago. It happens every year.
https://www.amny.com/new-york/brooklyn/spate-of-violence-sul...
My city, which is not exemplary by any means, after a fuckton of political backlash about the "policing" that happens at protests and parades switched to having a small group of unarmed cops specially trained in deescalation (which is mostly marketing but eh, sure) and comprised of almost entirely minorities, women, and older folks. They're not at all shy about this unit being visibly nonthreatening and they just walk with the people, sometimes joining them. We haven't had any "riots" ever since. It's allllllmost like the police had been instigating them, funny that.