As somebody who lives in South Africa, I'd like to explain that there is a huge difference in lifestyle for those people who live in high security estates like OP's.
The people in these estates pay a lot of money (in property and in rates) to ensure that their security is of the highest standard. Extreme precautions are taken when visitors arrive and nobody who is not "vetted", fingerprinted and in possession of a South African ID would even be allowed to work in these estates as a gardener etc.
People in these estates absolutely do not live in a "state of fear". Honestly, not many South Africans really do live in a "state of fear"! There are a few who like to dwell on the crime stats (and not being nasty here but there is OFTEN a racist slant to their attitudes), and there are certain areas that are regarded as less "safe" than other areas in terms of crime stats, particularly house robberies. However no high security estate would fall into an unsafe category.
This is why residents pay so much money to live there. They are safely shielded from any threat of house robbery, any random crime, any "riff raff" that might make their lives unsafe or uncomfortable.
In a more densely populated, larger and extremely wealthy high security estate close to where I live, the biggest perpetrators of "crime" by far are the spoilt, rich teenagers who live in the estates and who go out at night and cause trouble!