Give him benefit of the doubt. He may not have known that to be kilted means more than just wearing a kilt. He may have appeared on the course in a kilt, but otherwise inappropriately attired in accordance with the club's rules. He didn't know simply because he didn't know. The club apparently accepts kilts on its greens. It was the Daily Mail that created the issue. Perhaps we should be understanding of both the golfer and the course on which he was a guest and have issue with the Daily Mail which failed, as so often it does, to report the news and not seek the sensation.