A drone is not only an idle person who has no other purpose is life than to loaf off of others, but it is also a pilotless aircraft operated by remote control, a so-called unmanned aerial vehicle (UAV).
There was that Borg cube orbiting the Earth for awhile, but I am not sure if that qualifies as a real drone or not.
All those snobby buggers wearing three-piece suits, carrying fancy-looking laptops, and sitting so snugly in the first class train carriage, while I am packed in with the other poor normal folks in second, yeah those are first class drones that's for sure.
Drone was also the name of one of the Star Trek Voyager episodes.
Finally, there was that detective drone guy who popped up in many of the British crime novels during the last century.
I guess then that you can characterize a 'drone' as someone who has an irritating lack of manners and general decency.