Isn't there a difference in wearing a clergy tartan in Scotland, where some will know its significance, and wearing it in America as Joseph is considering?

As a matter of interest, was the clergy tartan restricted to ministers of the Kirk of Scotland, or could Roman Catholic and Episcopal clergy wear it as well? If it was intended to let laity know there was a cleric present, then a good Presbyterian might well be fed up to find the kilt wearer as a servant of the Scarlet Woman of Rome, and equally a pious Catholic would want an authentic (in their terms) priest and not a protty minister. (I would never use those terms myself.)