I'm an American with geneology documentation that includes Dunbar, Hastings, and even to King David of Scotland. I spent months trying to figure out which clan I could approach to offically belong to, which tartan then should I choose, etc. It was all too much and I discovered I didn't need any of it. That there's so many great tartan choices, I could've and did just pick one I liked. I guess as an American I can get away with that, but my point is: us Americans owe so much to the Scots that it's okay to wear almost any tartan. To me, it's all about the kilt itself. It's not like I'm able to recognize every clan by their tartan. Now, if they wore patches on their back like some motorcycle clubs do, I might learn to recognize them.