Prius ownership is the ultimate and final abdication of having any involvement in the driving process, and the myriad Prius operators in the DC Metro are among the worst examples of "drivers" I've ever seen.
These are people for whom maintaining a 55 mph speed limit while keeping the car between the door handles is pushing the boundaries of their skill. I imagine an interstate highway at 70 mph looks to them about like T4 at Summit Point looks to me at about 100 when I'm doing it w/o braking. They're terrified, all the time and have absolutely no sense of how any of the controls influence what the car does. They're cavemen seeing fire for the first time.
It surprises me not at all that they'd catch the hysteria.