^Yep, not a matter of courtesy, it's a hazard to everyone. Police here give tickets if your windshield isn't cleared of snow. Not often enough though.

My all time worst winter pet peeve are the people with block heaters who are too lazy to unplug the extension cord. They stretch it across the hood and wind it around the side mirror. I've seen it come unravelled on the freeway and the cord goes whipping around from lane to lane. I kid you not.

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Wake up every day that would be a start.