I agree with mdLevine (or is it e e cummings?) that one should clear the windows, but you also need to clear the other surfaces of your vehicle. When you drive, the ice/snow will fly off and hit the guy tailgating behind you! If the person is not tailgating (e.g. you are “out of town”) it will severly distract/blinden them. So it is dangerous not to, no matter where you are driving. Please brush all the snow off.
yankdownunder – I was trying to figure out why the font changes in the middle of your posts. Do you use a `backtick instead of an apostrophe? Nice effect!