I am very familiar with widely available hobby components and completed platforms with payload and guidance capabilities.
We are not talking about a weapon of mass destruction — which takes a nation-state to engineer — but a tool or terror that terrorizes people when it flies overhead similar to V2 in WWII. Even a large firecracker would scare people if they think it might land on them. Send a few over a market area and customer traffic would go to zero.
I work with the companies that have developed and fielded the military Drones that we have fielded, and I'm also well aware of the capabilities of the civilian drones and likely derivatives that can be used to perform such “terrorist” attacks and I'm not going to lose a seconds sleep over the belief that said “low tech” will either shut down the economic activity of any given area in this country for more than 24 hours as long as our (given they are limp wristed) government and military are %10 as competent as advertised.
Seriously, FR has devolved into a hysterical forum of cowards as of late. That I feel depressed about more than the unbelievable hypothesis I see posted more and more as of late.