Prius drivers are the worst, period. At least here in SoCal, no other car on the road has such a consistently high ratio of aggressive drivers in a vehicle that can't handle it at all. On the freeway, they are almost always pushing 80+ and dipping in and out of lanes. No respect for faster cars at all.
I can't wait to get a catless X-pipe installed and have them behind me, forcing those hapless tree-huggers to sniff all of my untreated emissions with their fragile nostrils.