Good responses Superman. I'll try to respond to them:
First, I hesitate greatly when approaching the "it's illegal, it's the law, people know, end of discussion", while I put a tremendous amount of confidence in our country (go to Iraq... ok!), there are serious shortfalls in the management of it, and the reasoning behind certain actions (our budget and the food pyrimid to begin with). That's why it's very healthy to understand the reason behind the thinking that leads to these issues. Not to mention that I have always been a steriods is illegal / punish them guy until I put some serious thought into it.
You're absolutely right, and I'm not trying to hinge the argument on the legality of steroids. The reason, though, that MLB and other sports leagues have to crack down on these banned substances is because they are illegal. And once the government started putting pressure on baseball to do something substantial about illegal PED use in their league, they did something about it. There was no more flying under the radar. It's not that because it is or isn't illegal that it is or isn't acceptable, safe, normal, etc. But the legal issue is the primary reason that baseball had to do something about steroid use.
Splitting hairs is what it comes down to, because while steriods is not natural, technically neither is protein shakes. Yes, protein can be found in nature, but so can testosterone and other compounds that are illegal. Is lifting iron natural? Is taking a multi-vitamin natural? No. None of these things are natural, and they can all be very dangerous if taken in the wrong way or abused. Steriods is prescribed by doctors all the time, just not for the reasons that sports athlete's take them for. It's a very thin line and makes we wonder why spend so much time and energy on establishing that line (and why did we decide on that line and not another). It's puzzling and fascinating at the same time.
I really don't think it's splitting hairs. Your body takes protein in as a natural process. Getting more protein can be as simple as just eating more meat or taking a shake, but that's normal.
Your body produces testosterone and red blood cells naturally, and while there are many variables pertaining to how much of those elements are produced by your body, there is a natural range that most people are going to fall into, regardless of their diet and exercise habits. To increase the amounts of those elements in your system, either directly (by ingesting more than normal amounts) or indirectly (through products that cause your body to create more than normal amounts), is not natural.
There's a difference between eating food products that help your body rebuild tissues as a part of the natural process, and taking products that cause your natural process to perform at a level beyond what's normal for the body to perform at. In my mind, the distinction is clear.
Where it becomes a bit more muddled is when you're determining what's legal and what's not, as far as performance enhancing substances. Like, for instance, creatine and other muscle building products. But protein is completely different.
And as far as lifting weights is concerned, it's just an intensified form of exercise. Exercise is natural. I mean, next thing you're going to say is that jogging isn't natural. Your body needs exercise, and because we've found more effective ways to get stronger and faster, we can concentrate on a certain objective with a certain exercise. I don't think that's any more unnatural than learning memorization techniques or learning to type fast and accurately or learning to play music or any other number of things that we have to work at to be good at. If you want to be strong, you work out, and your body responds to that work out. When you start introducing different things to your system to get your body to respond in a different manner, that's when you change from something that's natural to something that's beyond nature.
And speaking on the golfer correcting his vision, is it okay for a golfer with normal vision 20/20 to go to the best eye surgeon to correct it? Where is the cutoff? All interesting questions that we will need to ponder at some time in the future...
I'm gonna watch Bigger, Stronger, Faster so that I can try to understand this argument a little bit better. I'll reserve further comments on that until that time, except for to say this: Corrective eye surgery is a medical procedure that is intended to help a person with poor eyesight get better eyesight. I don't see anything wrong with that use.