The example used of attacking rush hour highways made me think of just how effective that could be. However, maybe drones aren't the best means of attack - I'd

The example used of attacking rush hour highways made me think of just how effective that could be. However, maybe drones aren't the best means of attack - I'd think that an ordinary vehicle could simply have a passenger equipped with a suitable laser pointer and simply shine it into the eyes of a following driver. That would leave very little evidence and of course laser pointers can easily be concealed.