[tjradcliffe]

Likely counter-measure will be more drones. It's easy to knock a drone out of the sky with another drone, especially if the counter-drone is disposable. Avoidance technology becomes complicated. It's relatively easy to program an autonomous drone for clear skies. Adding threat detection and avoidance is a lot harder.

Or the US could just go with something that actually works, like the Portugal system of scrapping all drug laws. After fifteen years none of the imagined horrors have come true, addiction has dropped to half the previous value, law enforcement costs have gone down, and things are generally better.

People look at Portugal, see that the facts contradict their imaginary scenarios, and deny the facts, but that doesn't change them.