Not a bad read... WOS does many things during a group ride and we run a great atmosphere for a group ride.
We do things such as a group talk prior to the ride. A leader, a tail light watcher, and many hand signals!
Yet we still have people go down. No matter how much you talk.. you can't alter a riders mindset. Normally it's newbies that go down and it's cause they just get in too deep. Get into a corner too hot and grab some brake! This happens even after we tell them to "ride their own ride", and "we won't leave anybody behind".
Yet, riding with a group of guys, especially when they are going fast, is intimadating. And newbies are afraid of losing face...