Once I came to a stoplight next to a woman knitting w/her yarn in the passenger seat. When the light turned green, I waited to see if she would put her needles down. She didn't. She drove away still knitting.

Then there's those drivers who take their work on the road. Laptop open and on sitting in the passenger seat, cell phone in one hand, PDA in another all while playing around with their nav.<shudder>