My dad's been in his fair share of bike accidents, hence I try and be aware of and courteous towards bikers, but some of them are just real f-wits.
While I'm here I may as well add to the list -
Bikers that ride with brights and spotlights on blinding everyone in front of them.
Bikers that ignore car turn signals when changing lanes and play the victim and get aggressive.
Lane splitting at breakneck speeds.
Lane splitting combined with popping a wheelie at breakneck speeds.
Delivery bikers going through a red traffic light at 60km/h crossing Old Paarl road at night.
Side note, I was/am (can't make up my mind anymore) a biker, so this is just my viewpoint on how other bikers behave on the roads. Yes, I have witnessed all of the above, mostly peak hour traffic on the N1 heading into town or vice versa in the afternoon.
Darwin will sort them out but I just hope I do not have to witness it again.