I've had people try to pass me on the right, while I was making a left turn from the center of the left turn lane, while THEY were also making a left turn from the SAME LANE!
I believe that many motorists don't have a clue what to do when they see a bicycle in traffic. And that's not for lack of people using good destination positioning, either. I am not the only cyclist by any means who uses destination positioning. And yet there is always someone out there who just doesn't get it.