To be fair, South Africa has one of the worst rates of violent crime in the world, and it is thus quite common for "people of means" to have a loaded weapon near at hand almost all the time.
Crimes like car-jacking are so prevalent that locals do NOT drive with car windows down at any time, as it invites someone reaching through the open window at any given traffic light. High end cars are often ordered with the bullet resistant glass option.
Some have flame throwers that shoot up the sides to grill a would be carjacker. A buddy of mine said that when he would stop at a store he would drive in full speed with money ready, run in grab cigarettes, throw money at the clerk and run back to his car which was still running. Good times.