Gavin, I live in the snow belt and park in a garage. But,,, when I go to work and fly off for a few days and we get a snow storm, it is VERY nice to have my vehicle running if for no other reason to get some heat on the glass to help me clear the snow and be on my way.
I am anal about snow on my vehicle, I clean it down to the the polish on the metal. When someone passes me the other way and is a virtual snow machine it torques me off. No respect for others, you can't see their lights. The road is dangerous enough without adding one more jerk to it...