Umm people speak about lasers, energy based weapons and etc and etc. That problem was solved almost century ago. Flak cannons. The moment you have means to properly detect such cloud of problems, few flak cannons will rip them apart in seconds.
Low flying targets are hard to hit with flak I think. It's also hard to fire flak over the heads of a crowd at a public speaking event without hurting anybody.
No they wouldn't. Flak cannons don't work very well against low flying targets, they tend to just kill everyone on the ground.
Morso, flak cannons are less effective against small targets due to a smaller amount of debris.
Finally, there's no reason for the drones to be that close together. You can have them 30 meters apart , flying at an altitude of 20 meters or so. What then?
Finally, there's targeting. How are you going to target reliably a threat you've never seen before that's a similar size to a lot of birds?
