These days it is a free-for-all in South Africa. The cops prefer to collect bribes simply by standing next to the road and stopping cars randomly instead of doing proper law enforcement like reckless driving, they will nail you for not having your drivers license in the vehicle for instance (which won't cause an accident). The last time I was there I got stopped at least once a week. I have driven thousands of miles in the UK, France and USA and never once been stopped.
The terrible crash in South Africa in 2010 in which a school bus driver went around the barrier at a level crossing and was hit by a train killing 10 school children springs to mind, he got 20 years in jail which was reduced to 8 years, he should have gotten life in prison.
Another school bus level crossing tragedy happened in 1970
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