Interesting discussion here.
I agree that PED testing in MotoGP should be under WADA. PED abuse and testing is a technological battle, and in order for testing to be accurate, the latest testing technology needs to be used.
It is true that the same length of ban may be different in different sports, as competitors careers last for differing lengths of time, and re-entry to the sport after an enforced layout may be more or less difficult in different sports. But if this is a problem, then sports governing bodies should negotiate directly with the drugs testing bodies to get different punishment scenarios for different sports. Withdrawing from state of the art testing is not the answer IMHO as a small sport like MotoGP won't have the resources including people and laboratories to apply state of the art testing.
It is unfortunate that competitors drinking and energy drink or consuming a herbal remedy may accidentally (no quotes) consume a banned substance and be penalised. But, as well has having rules that are fair, you need to have rules that are workable. If the 'accidental consumption' excuse was accepted, then you may get large numbers of athletes 'accidentally' (now with quotes) taking these drinks and supplements knowing that there are banned performance enhancing substances in them, but maintaining plausible deniability. You may even get a market for energy drinks and herbal remedies that do contain these substances, intended for consumption by athletes maintaining plausible deniability. I don't think giving too much leeway for accidental consumption is practicable, because it creates loopholes, and opens the door for abuse.
Low levels of detection don't necessarily mean that PEDs are not a problem, as mentioned. Lance Armstrong passed many drugs tests. We now know it's because he was using PED technology that was ahead of detection technology. The same could easily apply in MotoGP now, though TBH I suspect that it isn't.
If MM was found to be taking banned substances and banned, it would be bad for MotoGP. But if MM was found to be taking banned substances and somehow was let off, that would be even worse for MotoGP. If MotoGP didn't test, there would most likely be a wide perception that this was a 'doping sport', and this may be bad for MotoGP. If there were MotoGP riders dropping dead at 31 which happens in some sports, that would be bad for MotoGP. I can't see a better solution than MotoGP continuing testing, and if a big name falls, then a big name falls.
Just one additional comment. I believe that the penalties for PED use in any sport should not be relative to the unfair advantage gained. The penalties should be sufficient to be a powerful deterrent. This may mean that the subjective effect of the penalties may be different in different sports. Otherwise you get small advantage but small risk in some sports. And the actual perceived worth of the PED considering the risk of detection may not be a simple linear ratio of risk:reward. Also, while the advantage of PEDs in MotoGP may be smaller than in some more physical sports, the differences between the athletes is also smaller. E.g. on many tracks a second a lap difference in qualifying may be a 1% difference (if we have a 1:40 lap). That's a time equivalent to a 400m run. When was the last time you saw a 400m race with the competitors as close as a typical MotoGP qualifying? There is potential for more gain in terms of result placings for a smaller %age performance difference in MotoGP compared to some other sports. So, comparison of effect is quite complicated.
BTW: The Serena Williams panic room incident seems very odd. I can't find information about whether or not she did actually submit to the drugs test that was the purpose of the 'intruder's' visit. http://tennishasasteroidproblem.blogspo ... -test.html