And we've come full circle...
Please just read your comment above. Yes, I agree, it's the UCI who should be keeping an eye out. Of course, we've seen exactly how effective they are at administering the anti-doping regulations, directly or by delegating it to federations. It's the same thing. They aren't going to enforce the rules evenly when it affects star riders.
Likewise, it's the cycling press who should be the safety net to provide checks and balances. Yet, the process of selecting who gets into the caravan and to sit on a motorbike is as politicized as anything else. That's why we have Graham Watson acting like a fool, and that's why photogs are loathe to take pictures of 3 Highroad guys doing tractor pulls on the team car. Just as almost no one will ask hard questions regarding doping if it hurts their access, relationships or paycheck.
"But there are people and cell phones and motocameras everywhere, shouldn't we have pictures!".
"I've been tested over 500 times, and never a positive". Smells the same to me.
Every rider and every car has a radio, and the caravan rules state that the cars there are all cars with guys riding. So they all have a vested interest in not getting caught. Again, not much different than the Omerta regarding doping. Avoiding detection from towing is no more difficult than beating a drug test, so the lack of evidence is not evidence. 3 guys riding at the speed of a gruppetto is, to me, evidence. It's unfortunate that the guys in the group are reluctant to actually come forward with their data regarding their power and speed, but it shouldn't come down to the riders having to provide this evidence.