Earlier quoted context omitted.
The problem arises when non-state actors wreak havoc with drones and AI with inpunity. What would we do if a drone made by a no-name manyfacturer dropped some bombs in Times Square? Who would we blame when someone uses AI to actually sow social mistrust and subvert our existing systems?
I'm pretty sure that drone-tracking equipment is mounted all over NYC, and more is being deployed as we talk. I can also imagine that a rouge drone arriving from afar and large enough to carry a bomb will be shot down by police if it can't be identified. If it does not carry a bomb, police will apologize.
In fact, the only reason such drone attacks don't happen, or why people hadn't been casually blowing each other up for the past five decades with explosives attached to RC cars / planes is that in general, people are nice to each other. There's plenty of tools out there for dedicated people to wreck havoc in populated areas. Such people simply are very, very rare.