Wisconsinites who enjoy Kellygold Irish butter have been forced to venture across state lines to buy the gold foil packaged dairy goodness. Butter protectionism in the Dairy State has made this foreign butter illegal.An obscure regulation turns "ungraded butter" into contraband. Since Kerrygold isn't produced in the good ole U.S. of A., it's not graded and hence, illegal. Selling illicit butter bears a fine up to $1,000 and a possible six-month stint in the slammer. If you haven't tasted Kerrygold, I can assure you it is definitely worth the drive across state lines. It's pricey, but worth every penny.Wisconsin local...