One of the many reasons I don't enjoy riding with a large group
If its going to be more than 10-15 riders, I'm stayin home.
I agree people should be aware of the rules of the ride. Just being aware that you aren't alone and being considerate of the other riders helps a ton.
People who come riding up at a gallop behind me or at me get my dander up. Alls it takes is a "passing on the left/right" shout out would be great.
I don't always hear them coming and it scares the poop out of me and my horse.
I had a guy do that once and then laughed when my horse spooked