I think the defensive comments I've heard from strangers are my favourite. One time last year at school some girl (grade 8 or 9 at the time, and dressed quite... trashily) made some snarky skirt comment, and out of nowhere one of the seniors that I didn't know burt out with "Hey, you. It's a kilt, and if YOU want to think of it as a skirt, at least HE doesn't wear it like a tramp." It gathered a little popularity with the other seniors after that point.