I had cause today to use my car to get to a new job as the bike is getting a new tyre and tune up. I am travelling citybound peakhour on Epping Rd, Sydney,stopped at the lights in gridlock. I spot a rider trickling up behind me. He is travelling at a fair clip and hits my drivers side mirror and smashes it with his pointy style Kawasaki mirror as he trickles between my car and another. On he rides, does not stop. I cannot catch him in the traffic and all I saw of his rego was a P plate. Great. Ok, shit happens. The new mirror will cost me $50 and an hours time to fix. Coming home later that day in the opposite direction, I am doing about 20kmh in peak hour traffic again. Traffic is slow but flowing nicely. I see a dirtbike coming coming up behind me, he trickles past on my right no problem then suddenly swerves in front of me and across another 2 lanes of busy traffic to get to the bus lane on the left. Traffic all around brakes hard for him and then he is gone, lucky not to be roadkill or to have caused a pileup. A few minutes later a rider on a nice Speed Triple appears behind me and does much the same thing between the cars on my left, only this time the rider half drops the bike, makes an awkward recovery and blats off into the vacant bus lane at warp speed. I am not one to usually heap scorn on fellow riders, but I have to ask, what skills do these fellows (SQUIDS ?) have, apart from being able to ride fast ? It is interesting and enlightening to hop in the car sometimes and observe the total lack of roadcraft obvious in some commuter riders. Sad. They give all fellow riders a bad name.