A little story....last year I was on a typical club B ride with about a dozen other riders. As we were on a flat, in a line at 20+ mph, I was leaving a bit of a gap between me and the rider in front of me. A former local racer and very skilled rider came off my wheel to fill the gap. I stayed on his wheel. After the ride I said to him, "You didn't like that gap?" He said, "Yeah." I explained, "I know that guy and I don't trust that wheel. I'm sure your skill level is higher than mine but I'm just not going to be on that wheel." BTW, the ex-racers in the club have said that my skills are solid. But, as has been stated, one bad move by an inept rider can take a lot of riders out. Just another reason I don't like recreational group riding.