Rides like that often lack strong leadership/ownership and a "chat" at the start. Rides that "nobody owns" will eventually devolve into a dangerous free for all as everyone does whatever they want.
The leader should take charge and call that crap out before the ride and during it, and ask folks to not return if they can't act right. Or threaten that you'll call up their team captain/owner and ask them get tossed.
We have a pair of 1/2 dudes that show up once in a blue moon to our weeknight worlds (race sim) and will go the wrong side of a divided stop sign divider at full bore right head on at cars as it takes them 2 seconds too long to go the right way around the corner/sign. There were words once, and they haven't come back nearly as often.