Now days in my F-250 the worst thing I have to worry about is minivans with fish emblems, ribbon magnets, and Cheney/Palin stickers doing 45 MPH in the fast lane.
In my wife's new BMW, it's Volkswagen Jetta/Passat drivers with an inferiority complex that pull the "If you try to pass me, I'm going to accelerate to 90 and then slow to 55 once I get alongside the next car" routine.

Welcome to Washington, land of the stupid.