So you think it's up to Bob to rid the sport of bodybuilding of drugs? Sorry old man with great gym, but Bob isn't as powerful and influential as you seem to think he is. And drugs are here to stay. In bodybuilding and every other sport where size, strength and functional ability is a factor. And guess what, nobody really cares. You ever look at the comment section every time there's a steroid bust? Most think it's a waste of time. The only one who cares is LE. And they care a lot. The government always wants to increase it's power and control over the populace and decide what they think is right and good for you.
And why are you so concerned about what performance enhancing compounds he has used in his career? I'll can help you with that. Just write down all the PED you can think of and just assume he's used them. So what? It's illegal and it's against the rules and they all do it. No drugs, no bodybuilding. No drugs, no record breaking performances at the Olympics. It's just the way it is my Aussie friend. It's not going to change and nobody really cares. I know you don't like it but as my mom use to tell me when I said I didn't like something: "Too Bad! This world wasn't created just to please you."
Perhaps you should put more energy into getting in shape. The government here wants to put an additional tax on junk food because obesity is one the leading cause of heart disease. The leading killer in this country. If people were forced to eat better and exercise health care cost would plummet. But the question isn't always what's good for you but rather who should decide. If someone wants to eat themselves into grostesque obesity, body pierce themselves into oblivilion, tat themselves like a cartoon character, smoke until their lungs rot or use anabolics to become grostesquely muscular -- it's none of mine, or anybody elses, business.