That said, IMO the concern with them selling their goods somewhere else isn't that we won't be able to eat their burgers, but that they employ tons of people at their stores. People are going to be pissed if Burger King decides they're going to close down their slower stores in the US and open some new stores elsewhere that doesn't have tax because they'll end-up making more.
I agree in that we could put a tax in place without anything imploding, they aren't just going to run away obviously. The question is more can we implement a tax which would be worth the money we'd make off of it without it resulting in Burger King closing places around the country because they're not profitable anymore.