OK. Mr. S. I agree with your assessment of the 4 way stop... the same thing happens here with cars! No one seems to understand the person who arrives first goes first. It worked like clockwork in AZ, but I guess drivers in MA are so indecisive, they can't handle it. We actually have cars stop dead in the middle of main streets to let approaching cars from the side street turn onto the main street. They don't get you never just stop dead in the middle of the road that has the right of way.
I do come to rolling stops on country roads with few cars. I always unclip and could stop fully. Mostly I do. I ride a lot around areas with tourists (downtown Concord), kids, etc. I get in the lane and act as predictable as I can.
TC Trek, my husband has run into a similar situation as you describe. Every Friday there is a group of riders who assemble to ride at about 6:15 AM, in the lot by Walden Pond. They are obviously serious racers who are training. If my husband is driving, he has to blow his horn every time, as they absolutely will not get into a single file line to let a car pass. They give him the finger, etc. Now, this is on a narrow, heavily travelled road that is in terrible condition (pot holes). If it is a day my husband is riding, he usually goes by their route a bit after they have come through. He notices a distinct change in the behaviors of the drivers because they are pissed at group, see another cyclist and take it out on him.
This is all so upsetting. Police here are beginning to ticket, also. Last Wednesday, my dh got in an argument with a guy on our ride who was bragging about being ticketed in the neighboring town. He felt he should NEVER have to yield to cars, just because he has the right to be on the road. When I asked him about common courtesy, he sneered.