then did any of the numnuts at Malaysian or even ICAO not consider the situation of an engine failure resulting in an 'unauthorised' drift down or even worse, a depressurization event which would result in what would appear to be a very aggressive high speed descending manoeuvre.
Jetsam the area is approximately 50 miles in diameter, in any emergency situation they would be clear of the area in a matter of minutes.
Last time I checked civilian jets don't go 'vertical' on descent!