The attack on Saudi oil installations brings up a whole lot of issues. The price of oil is just one of many.
Most seriously in my mind, it shows how easily a drone can be used to engage in activities that are dangerous and life threatening to anyone, anywhere. For a relatively small cost, bad actors can perform egregious acts of violence. Drones have been flown around many airports, such as London, in the past creating a potential for dangerous results.
And people want armies of drones flying down their streets to deliver goods just so they can get their purchases almost real time and cheaper? Has America gone stark raving mad?!