**** you, mailbox! .. Sorry to hear. I got caught drivin' on my ECSTA MX/KDW-2's in October when it randomly decided to snow. But I just pulled over and literally sat there on the shoulder until the roads cleared.
A few nights ago, it snowed for real up here -- we got about four inches. My roomie and I were headin' out for the night when about two inches were laying, and she said she'd drive. She has an old-school Cavalier with random all-season tires on it. I dunno if she's really just an idiot, but after sliding through not one but TWO turns and ramming a curb, she finally decided to drive a little slower.
Have you checked to see if you can just buff out those scratches? Looks like it might've just been the coloration of the stupid mailbox on your bumper.