There is a reason they call it the Persian Gulf.

A blockade would be considered an act of aggression and since the boundaries of the gulf are questionable, the conflict is inevetible.

Consider a similar action off your coastline. Defense is different than aggression. It certainly can be seen as hostile.

Once again, the U.S. is demonstrating to the world that they are bullies. I saw a t-shirt the other day that said, "What are we going to do about the United States?" Quite frankly, I'm sick of the influence they exert over other countries, their foreign policies and their economy.