I used to deliver fuel to gas stations in Dallas on the night shift some years ago, and these dumbfucks would come flying by me at about 120MPH. I've even seen them riding wheelies while split-laning through rush hour traffic. No protective gear, very often not a helmet. One time it was about 3AM and I was rolling back to the yard empty, not really paying attention to the rear view (no traffic out to speak of) and about 12 of them blew past me... I almost had to clean up after myself!
And understand, I ride a bike. At that time I was riding my CBR1000 to work everyday... but I've seen too many accidents and death on the highways to drive like that.