Where is the line drawn?
BKK has been mentioned, I don't think there has ever, in the various coups in Thailand, been any concern for the safety of civilian aircraft and occupants, although delays have occurred.
JNB / LOS : Images of aircraft stood on bricks come to mind. Crews not allowed out of hotels unless in large groups and/or escorted. These are highly lucrative routes (except for SAA who could lose money on any route even with no competition), but will the airlines suspend them? No.