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.
They key difference is that the chances of having the structural integrity of the aircraft compromised or pax/crew injured or killed
whilst on board at JNB or LOS, is remote.