[Rjevski]

> The good news is that the vast majority of people with the necessary technical skills are not willing to commit mass murder.

This is the key point of the article. The truth is, you could build a drone capable of taking down an aircraft, or delivering explosives, or similarly nefarious thing even 10 years ago.

I looked into AeroQuad around 2009. The site seems to be dead now, but it was a community around building DIY drones. Everything needed to build a fully autonomous, remotely controlled (through mobile networking, so could be operated from anywhere in the world) drone was there already.