The kid is a geek. The kilt look like sh!t. No socks. Any true Scot would beat him up on sight. What a jerk.
How he looked isn't the point. Had the principal said "he's not dressed formal enough, or neat enough", that would be understandable. Require him to be more formal (though I doubt he would have been the "worst dressed" anyway). No, it's the fact that the principal considers someone dressed in a kilt to look like a CLOWN! That's my hertitage, and I'll be damned if I'll let someone walk all over it. Had this been some traditional South American, or African garb, there would be large scale public outcry already....