Technically, those are vehicles also. Light vehicles, depending on how much AI they're carrying maybe. Otherwise, they're just RC hobby/perv/camera planes. A better example of light robot drones would be those used in Minority Report (that scanned eyes). And huge examples are the ones in the Matrix and Terminator and DUNE movies. Star Wars has plenty of sizes for drones.
Or... RC drones are just TL7, maybe higher TL if a better camera is installed. But someone is still controlling the thing, and they can knocked out of the sky easy (or just stepped on or run over). Then the higher TL drones will have AI controlling them, and shielding, and weapons. If a flying Drone is just a weapon, that's pretty much a cruise missile or smart bomb. Do we want to go there with Drones?
Or... Drones can't have AI. That's what Robots are for. And do we want Robots doing what Drones currently do?
Decide on a setting first for what Robots and Drones will be/do in the 57th century.