Until you feel persecuted and (in my case because I'm not white) profiled when they drive past the white guy and pull up onto the sidewalk to question you. Yes, this happens to me a lot!
Hey jy, jou lang nai. Where are you going? Where are you coming from?
Me: first of all jou ma se po3s, secondly we can go to the station right now and we open counter crimen injuria cases against each other. Thirdly, unless you go and cross-question that white guy whom you passed and, instead, pulled your bakkie up in my face, I'm also going to open a case against you with IPID for harassment and police misconduct - preventing me from walking in a public space, without probable cause infringes on my constitutional right to freedom of movement.
It's loads of fun messing with them