Dumb drivers
I'll differentiate dumb from aggressive or reckless. Aggressive is speeding to get around me before my lane ends (shame on you); reckless is veering in and out of my lane to get around me before my lane ends (wow, you might kill yourself); dumb is aimlessly speeding and slowing mindlessly, ensuring that I can't get into another lane before mine ends. Dumb driver, you are a mess! Doing your makeup, talking on your cell phone, and eating a footlong - you are a hot mess of driving fail!
Dumb drivers, you suck!