Spotted driving near Alewife on Tuesday, headed toward Boston, was this 30-40 year-old man with a bluetooth phone in his ear, chatting up a storm. It's safe to assume some of his attention was going to the phone call. Some of it might have been going to directions, too, because he had a car-portable GPS in the car. Not much attention left for driving. That's OK, though.
There's no point paying attention to your driving when you can't see where you're going. His GPS is smack in the center of the windshield, right below the rearview mirror. (See detail; click for larger.) It blocks a good 10 degrees of visibility. How stupid can someone be?