1) current small racing drones have speed >80mph, that's 35 meters per 1 second. You won't even have time to hear them and react while under attack. 2) current

1) current small racing drones have speed >80mph, that's 35 meters per 1 second. You won't even have time to hear them and react while under attack. 2) current drones already have 4 tiny knives (blades). Enough to make it slightly larger/sharper and/or from titanium instead of plastic. That's enough to cut your throat or wrist and let you bleed to death ... 3) ... cover those blades with some venom or poison for "extra efficiency" 4) ... they probably don't even need some bullet - enough to detect your eye and stab you with a nail covered with venom/poison I doubt you would have any chance with just a dozen of slaughterbots. edit: formatting