Adam...
Heres my perspective on the whole pro-hormone thing....
Back when AST came out with their androstenedione/diol I tried a bottle of the Ultimate Nutrition Nor-19. Did I see anything from it? Nope. Do I think it was even potent? Nope. A lot of claims were made with it being 'just like steroids'. Yadda Yadda. Nothing is like steroids, except steroids. Now, fast forward a few more years and you start to see companies literally pushing the envelope on what they can sell as an OTC prohormone and what is a drug. Did that happen when I took them? Nope. Do I still think I am life-time drug free. Yep. If I did the whole M1-T (or whatever that was).....then nope.
As far as the Arnold thing...well, you couldnt very well go to a GNC-type of store and get that stuff. You had to go through dealer or a Walgreens type of store. Definitely a drug....definitely not a natural no matter what the DEA has classified it.
This is, and will be, a debate that will be as ongoing and never ending as the whole LaCour debate.