I had a rational conversation with the driver of a large truck last year. I was riding about right tire track when he honked from behind and then passed me safely. I pulled into the left turn lane at the next light and he was already there, stopped on my right. I wasn't concerned about it, and wasn't planning on saying anything. Then I heard him tell me "You should ride on the shoulder, it's safer" I explained that the shoulder was only a couple of hundred feet long (true) so it was not useful to me. His response was that it's still safer for those couple of hundred feet.

We went back and forth a couple times on the rules of the road and proper lane positioning. His last comment was something about getting myself killed and how he knew best because he was a professional. No minds were changed, but I was impressed that we both stayed calm the whole time.