pneumatic Bean Bag cannon with 50 round rotary magazine.
That way you are not discharging an actual firearm.
You know you can take them down with a slingshot that tosses a sinker pulling fishing line.
rotors get tangled up and *foomp*
Dish towels work too if they are really low.
Ok. no more evil ideas for the rest of the day.
"With ordinary talent and extraordinary perseverance, all things are attainable." - Thomas Foxwell Buxton
How about a "fly-swatter" if the drone is small and gets too close to one's person - or is that considered too evil?