I agree, it's a big no no in my book. The only counter argument could be that the forces that be tend to put double whites when they just are not needed, which can lead to loss of respect for when they are needed. I always consider this though; okay so there are double white lines AND I can make the overtake safely. BUT, say for example I crash round the next bend. The vehicle I'd just overtaken would say that I was riding wrecklessly as I crossed solid lines. I am forever thinking of the events that may lead upto a crash, even if I was not at fault. If I was tearing about like a loon and then crashed due to no fault of my own there would be witnesses that woud say so which could harm my defence. Despite my username I find myself being much more sensible these days when it comes to speed. Afterall you can still get your kneedown at 15mph!