Aalborg University’s Drone Research Lab based in Denmark has tested a catapult contraption with a Drone rotor and propeller against pig flesh. The results seem to be as you would expect even before you attempt the experiment. A given hypothesis is that a high speed propeller can cause some damage to skin or flesh as any sharp object would.
It is interesting as an experiment but there seems to be a lot of negative press about this from several news and tabloid sources. Drones get a bad rap and continue to be a favorite of regulation advocates for privacy and security. There will be more experiments made with larger and diverse drones as time progresses.