I mean…you can’t, at least not right now, not for civvies. Let’s consider some of the current countermeasures:
* Flak/Shrapnel/Birdshot: An excellent last-minute defense if you’re calm enough to line up an accurate shot, but data shows that equipping civilians with these sorts of weapons en masse is a bad idea for safety and well-being. That’s a no-go.
* Nets: Popular for defense, but it’s a matter of time before drones adapt by flying under the nets or changing payload to something to dissolve it. A kamikaze drone could also be enough to destroy an opening for more to swarm. In a civilian context, they’re an excellent deterrent for high-population areas, for now, albeit unsightly.
* Buildings: Safest for now, provided the structure is relatively hardened and the windows are secured. But most civilian structures aren’t guarded against explosions or external attacks, and even those that are require a human to vacate it eventually. Once inside however, there’s more options for stopping an attack - for now - like interior netting, small arms with pellets or buckshot, or even lasers to blind the optical sensors. Impractical for civilian deployment at scale, presently, and highly variable.
* Jammers: Good against piloted drones, but as the article points out, the current crop of dev work is geared towards autonomous slaughterbots instead of human decision-making. Jammers are restricted by most countries and, if left functioning after an attack, could hinder first responders. If left on constantly, would disrupt civilian work. So that’s a no-go.
* LASERS! Probably the best deterrent in the short term for civilians, I would wager. A randomized strobe of a high-powered IR laser could devastate a swarm of drones’ optics, making navigation or target acquisition difficult or impossible. Sticking a piece of protective glass on the sensor would likely nullify it long enough to finish its mission, though.
And that’s what distresses me, ultimately. The future depicted in Slaughterbots or Horizon is rapidly approaching, where autonomous drones can murder with impunity and are affordable enough that any threat actor could get their hands on it. Combined with modern databases of humans - faces, biometrics, profiles, locations, habits, schedules - we’re nearing an era where assassination or murder is a drone away.
That is what horrifies me. And if there’s one thing my time in the defense industry taught me, it’s that nobody is trustworthy with that kind of power. Companies making these absolutely will use them (or condone their use) against dissidents, opposition, regulators, and governments. Pandora’s Box is already open, and I don’t think enough folks appreciate the horrors it will bring.