Perhaps but one would expect that one would have to be a fool to "dope" in the sport of cylcing given how tightly it is monitored. So really you are a cheat or a fool (or you end up in second place). Doesn't seem much like anyone comes out a winner!
much of what we are reading about lately (Ryder, Lance Armstrong, Tyler Hamilton, Michael Barry) happened some time ago. These guys didn't necessarily fail drug tests but got caught due to confessions from other cyclists or due to police raids. The sport now uses "blood passports" which tracks an athlete's blood components over the season. Doping will still occur as for some it means the difference between getting a pay cheque or not.
I hope it doesn't seem like I am defending doping as I am not. I'm defending cycling. It has a bad reputation and not entirely undeservedly so. The sport is working on drug testing and catches cheaters.
I often wonder why we almost never hear of North American professional athletes failing drug tests in Hockey, Football or Basketball. Suspensions for recreational drugs maybe but those athletes would benefit from the same drugs as the cyclists do.