Totally agree. Each drone already has 4 sharp blades. Easy to replace them to be slightly bigger, sharper and from e.g. titanium instead of plastic and covering with poison/venom.
Enough to slit someone throat/wrist and wait until bleed to death or detect someone eye and stab with nail.
Wow, sharp blades now that sounds dangerous. If your drone is basically a flying lawnmower I can see how that will kill or heavily insure hundreds of people with a single drone.
But that isn't very surprising though. An Apache helicopter can kill hundreds of people as well...
What's surprising to me is that someone suggests that we do away with the toy drone swarm idea and to increase the capabilities of the drone without requiring an additional payload.