1) I purchased some "minutes" "top up" at a store in Otavi at the gas station one evening.
The machine was located within arms reach of the door. Literally.
As I was putting the money into the machine I was surrounded. I wondered why I had gained two close friends that wanted to be within shoulder rubbing distance.
Seemed a little weird, until it dawned on me. The PH and security guard were blocking the view to the machine and any potential long armed crooks.
2) I drove around a garbage strike "protest", just like I'd do at home. The only stressful part was driving off route in a town I did not know.
No issues really, four blocks and back to the highway.
3) We walked around back of a mall, looking for the entrance. A security guard noticed our direction and followed us and then asked "what we were looking for?".
I stated the case and we were redirected. He was more concerned about our safety than we were.
4) Driving myself at night has me more concerned than anything in Africa. Unknown roads, animals crossing and drunk drivers and crazy taxi drivers. Never thought once about being robbed.
Statistically, the short term Safari hunter is in and out and usually has a local with them (PH).
Flint Michigan Highest murder rate in USA in 2012. 18.7/100,000
Johannesburg 30.6/100,000
I have only heard of a few stories of "crooks" entering camps and hassling hunters. None of those in RSA or Namibia.
I'd be more concerned about being "fleeced" after the hunting is done and you are trying to get your trophies home and when you go to settle up with car rental companies.
A source for some useful tips:
69 Tips on Johannesburg Warnings or Dangers - Stay Safe!