I generally stay in the right tire path. If I get too far right cars do try to squeeze through. If it is absolutely unsafe for them to pass me, like on a couple of hills they can see over till we top them, I get over to the left a little more so they dont try. I try to stay as far to the right as is safe. That does not mean riding in the right turn lane with the intention of going straight at an intersection or something. And it can mean merging left accorss several lanes of traffic. I just stay as far right as is safe, but not too far right.

I dont belive most the lanes on any road I ride to work on are wide enough for both me and a car. If they are dumb enough to try to squeeze though, they are too dumb for me to want to share a lane with them. The times I have the most trouble getting buzzed is when I am too far right.