I had this come up today at the renfaire, I saw a fellow in a kilt with the basting stitches still in. As I appoached him I saw he had it on 'sideways' as well, with the right hand buckles in front.

So I greeted him and pointed out the stiches and buckles etc, and he said "Thanks man, I didn't know", to which I replied "no worries, glad to help" and moved on. I saw him a couple hours later, and it looked like he had the stitches out, but still had it on side ways.