Might have been smart for the rest of the world to follow our faa
Hindsight being 20-20, of course.
FAA warned about Crimea and the surrounding seas, but not about the place where Russians shot down this plane. From your link:
“United States (U.S.) flight operations are prohibited until further notice in the airspace over Crimea, the Black Sea, and the Sea of Azov”
“The FAA said Thursday afternoon that the Malaysia Air flight that crashed was not operating in the specific airspace that was included in its April 3 warning.”