The logic, if you can call it that, behind banning substances in professional sports is rooted in the same kind of intentions as our 40-plus year war on drugs. Drug policies in professional sports like Major League Baseball are cheered on by proponents in the name of “keeping the sport pure,” just like drug warriors petitioned for harsher drug laws in hopes of a “drug free society.” But there has never been a drug-free society – ever – and like most professional sports, Major League Baseball has never been “pure.”
— Read on www.drugpolicy.org/blog/banning-drugs-sports-does-not-reduce-drug-use-makes-things-unsafe-players

I don’t really know if I agree with what the author is saying here.