As Fort Wayne and New Haven bar owners could tell you, if you ban something people want in one jurisdiction, and an adjacent jurisdiction still has it, people will still get what they want:
New Jersey bakers are hoping the Big Apple's trans-fat ban means more dough for them.
As of today, the city's prohibition on hydrogenated oils extends to all baked goods, but no such restrictions exist across the river in the, uh, Larden State.
So now, people will argue that, hey, a trans-fat ban obviously doesn't work, because just look at New York. It has the toughest ban in the nation, yet the faticide rate just keeps growing.