I don't stare at drivers of a Prius. But, I dread being behind one. Pay attention, you'll notice two types of cars that the drivers drive very slow in...Subarus and Prius's.

They might be staring at you because you're slow.

Also, I heard the batteries have to be replaced every few years and are very expensive to replace. So, if you compare gas $ savings to the battery $ costs. You really aren't saving money. But, people fell for the scam anyways :)