Care to ummm.... explain for those of us who don't take steroids?
Sure. First, there's tons of borderline-legal pro-steroids and prohormones out there. You've probably heard of andro and all that. Well, the compound androstenedione is crap (what McGwire was said to have taken). Very little anabolic activity (which is what athletes want) and very affinitive to estrogen receptors (very bad, causes weight gain...no good effects).
THG is not very anabolic at all and very androgenic. There are much better compounds out there including 4-AD, 1-test, 1,4 andro, etc. These compounds are legal and most can be obtained at a GNC or equivalent. I'm not sure why the media chose to pick on THG. Even 'real' steroids can be taken effectively without detection (if you know the compounds' half-lives and you play it safe). I could go on.
Most people don't know how deep everything goes. The percentages of people that take stuff is very high. The big problem is that everyone wants to just turn the other cheek and assume everyone is clean. Another problem is that people think that steroids will turn a regular person into Arnold or a world-class sprinter overnight. BS. To sprint competitively at an olympic level, you have to have amazing genetics, amazing training, amazing diet/nutrition, and something to give you that boost.
It's a sad state, but I firmly believe that there is NO way to eliminate doping. At some point, everyone is going to have to accept it. To do otherwise would be ignorant. Do you know how much the top athletes make? There's always going to be a scientist putting out the latest undetectible performance enhancer. The sports supplements market is huge too and growing extremely fast. The opportunity for profit is immense.
I'm rambling. Stop me.