I'm pretty sure MM can defend himself, but it is a widely held perception that doping is widespread in a number of sports including track and field - this perception is discussed at length often around big events, such as the olympics. just google doping and sports and you will find endless discussion about it - and many people on the inside, former and current coaches for example, are often among the first to say it is so. A current debate seems to suggest it is so wide spread and testing is so unable to 'catch' people in a timely fashion if at all that perhaps doping should be leaglized and regulated.
I'm not advocating the latter point; nor am I saying all or even most athletes dope; but that there is a widespread perception that it is occurring and a ongoing and robust discussion about it, yes there is. I, although aware of all of the financial pressures and ever increasing use of 'acceptable' technologies to enhance performance, remain something of a purist and wish that athletes wouldn't dope, and am able to retain a certain kind of naive optimism that my favorites - or the ones i'm watching at any given moment are clean. I let the experts and pundits make the accusations, do the testing, impose the sanctions....
) it doesn't necessarily follow that i want Usain Bolt to lose the 200. In fact I hope he can make monumental history and win it. My worst thought is that he might fail a drug test. 
