It is not meant to scale, it's a way to take down drones without shooting in crowded areas.
having high precision rifles with assisted aiming systems is surely way more effective.
I'm not sure if you're aware, but bullets don't always stop when they hit something... Over-penetration is a very real problem with very real consequences.
Shooting guns in a crowded environment may cause panic.
May?
A bunch of falcons dive bombing at drones might cause some panic, too.