There are about half a dozen cars I see on my morning and evening commute that don't give a stuff about other road users. One in particular in a white barina that has cut into the transit lane regularly. I once slipped around the back of her car and marked an X in the dust next to the number plate just to see if I came across her again.... sure enough the X is still there and she is still cutting up traffic. I have a large black texta and I'm planing on putting an X over the rear left break light of the cages that cut me up or just do something stupid. So if you see a marked cage, you'll know to keep an eye on them.