> if you can make a unabomber type of device you can construct a weaponized quadrocopter

It’s trivial, cheap, and simple to do massive harm to massive numbers of people.

Fortunately, humans don’t usually do this unless part of the government/military.

In a country of 300 million, the only non-state mass death events are a handful of terrorist attacks and deranged teenagers determined to shoot up their schools. The annual deaths caused by these non-state actors is, on average, less than the annual fatalities on a given stretch of a run-of-the-mill interstate.