I have always wanted to but I have been to afraid I would crash and hurt myself. Then that would lead to an even more uncomfortable situation back in the ski patrol shack when they find my diaper as they start to fix my broken leg. I consider myself a good skier but with my luck my fist broken leg would be while diapered.
Snowshoeing, sledding, and any other winter sport is great diapered. With bulky winter wear anyone could get away with an extra bulky and loud diaper.