I have found that leaving my left Wald folding basket unfolded helps. There are two ways to view how it works. The first is that it gives people a gauge to realize that the bicycle is wide. The second theory (my daughters) is that they are afraid that the basket will scratch their paint.

No matter how it works, I get more room with it unfolded. The second is that if I am really hugging the right people will pass closer than if they have to make a purposeful effort to pass. As such, as close as possible as you can get to the right will, counter intuitively, cause more close passes.