CDADave: Like Big Boat drivers, I think drivers of big pickups also operate their vehicles boorishly. I can't begin to count all the times when a big diesel rig like a Dodge Ram has filled up my back windshield with its presence, driving maybe 6 inches in back of me. And if I'm behind one of those big rigs, I can't SEE ahead of me. Sorta like having someone bend over right in front of your face.
DFO: I'm often amused by those monster trucks, too. They're generally driven by stock brokers with cowboy boots who've never done a day of work on a ranch. Throw in a cell phone and a pinch of impatience, and you have a royal pain in the butt on your bumper.