Prius drivers have a place right under Bimmer because of the smugness. 9/10, the BMW owner is usually the base or one above the base who drives it like it's a M variant. Hell, I crashed into a guard rail in March when a BMW 335i driver was on my tail, so I sped up to widen the distance and lost control and hit the guard rail.
I drive a nice POS, so when that happens I tap on the break. They either hit me, or back off. They've never hit me because their car is worth a lot more than mine!