[throwaway413]

IANAL. This is not the case.

Your analogy would be accurate if it went something like that beer garden in Germany decided to start selling beer online, and began taking international orders, including ones from Iran.

Your physical presence on the web is irrelevant. By putting yourself, or your business online, you are subjecting yourself to whatever regulations exist in the place your user is accessing your product.

As stated elsewhere here - enforceability is another topic.