They'll be banned for public use in the next 2-3 years. I'm not advocating for the ban, just saying it'll happen.

It's easier to make a "ghost drone" than a "ghost gun." Banning will not be feasible for bad actors.

Banning anything is never about stopping theoretical "bad actors", it's about reducing the number of normal people who pick up "bad thing" and making mere ownership a suspicious enough act to compel investigation. It's about making things harder. A gun on a black market will be more expensive in a place that makes guns in general illegal. Small time Timmy will not be able to afford a gun to back up his desire to rob the local liquor store.

Systemic design is usually about how you affect the margins