Having passed and been passed by teams running pace lines I found them all to be predictable and professional. Which is what you want.
What I didn’t find professional are single riders weaving in and out of other cyclists, riding all over the road, or bikers lecturing other bikers. I’m reminded of an incident going up a hill where a cyclist came up on our left in the other lane complaining that he shouldn’t have to pass in the left lane going up a hill. Then proceeded to pass in the left lane on a hill. He came across as arrogant and a complete idiot.
What ragbrai needs to do is get rid of the “ride right” motto. Its a idiotic phrase and anyone who yells it out comes across as arrogant. The goal is to ride predictably and straight. Not “right”.