You probably misheard. If they banned Haggis the jocks would fucking riot. Every chip shop in Scotland would be forced to close because a lot of their bread and butter is selling deep fried Haggis with a side of chips.
What you're probably thinking of, is they've banned importation of Scottish Haggis into the USA. Because Haggis contains sheep's lung and other stuff the Yanks have health and safety concerns. Doesn't prevent them from making their own, home grown, Haggis however...