I think I might email the LBS guy who heads up the ride to let him know. Maybe he can have a group ride ettiquete day or something. We have a lot of new riders that don't know anything about riding in a group. When there are only 2 or 3 of us out of 13 that have experience and knowlege about group riding, it's hard to teach it to the majority who don't seem to care and just want to ride fast.