That's illegal, at least in my state. A bicycle is considered a vehicle, the same as a car, and when using the road, is subject to the same rules of the road. If that means getting in the left lane to make a left turn, you do it, with appropriate signaling as required by law. If your presence in the left lane is slowing down other traffic, who cares? They'd have to slow down if you were a car turning left too.
Inattentive drivers are a legitimate danger, moreso to cyclists because of the vast disparity of weight. But cyclists who pick and choose which laws they want to obey on the fly are also increasing their risk and the risk of others on the road. I'm not expecting you to act as a vehicle until it suits you personally to act as a pedestrian, and expectations are how we avoid accidents. Granted, I come from a city whose attitude towards bikes is like Amsterdam bred with China, so maybe I'm slightly more aware of cyclists than the people near where you ride. But that also means I see my fair share of cyclists who think laws don't apply to them, and invariably they're creating far more of a hazard than the cyclists who do everything exactly by the book, including appropriate use of turning lanes.
