yep too many self appointed traffic enforcers on the road, IMO they cause as much if not more problems then the actually law breakers - reminds me what happened the other day on Rivonia off ramp - now with Rivonia the off ramp splits with 2 lanes heading towards witkopen / suninghill (where majority of traffic is headed) and the other towards Rivonia south - people going that way have to sometimes cross the solid line to pass a car or cars heading towards witkopen blocking their way, and actually they easing traffic at the back even though technically illegal.
The other day this traffic towards witkopen was horrible, an this guy in a hilux decided he didn't want any one crossing the solid line - so he blocked it because i guess since he was waiting everyone must will even though they not heading his way caused more traffic for everyone, and it was on purpose he wasn't stuck and had plenty of space to move to the left.