I don't actually care whether it's true or not - the OP brought it up as an example, so rather than challenge the example I'd rather challenge the point. This blog post starts as a thought-experiment for what would happen if there were no nation-states, which is clearly already in the realm of fiction, so if it's not true then just posit hypothetically that a Secretary of State suggested that the U.S. drop a bomb on an Australian citizen in the Ecuadorian embassy in London.

My point is that it's not actually Ecuador or the UK who keeps him alive, it's that the U.S. would be dropping a bomb on a private citizen in the midst of a city.