Taking a DSLR anywhere in JHB seems to be an issue. The Wedge in Rivonia had a issue with me looking at a camera while meeting a friend at the coffee shop (He was showing off his new toy). The security guard said it was a security issue. I was obviously planning a cash-in-transit hesit .
I have even had issues at the Wanderers cricket grounds they did not want me to use my 300mm lens and camera. They actually tried to remove my camera from me. My girlfreinds point and shoot which can zoom to 460mm was not an issue but mine was.
It seems that you need to get permission everywhere these days. esp. with SLR type camera.