Firstly, im sure you understand this morbs even if your post doesnt come across as such, illegal in sports and illegal in society are two different things, just wanted to highlight that. Second, when talking about natural versus non-natural in a bodybuilding context you cant put epistane, halodrol, M1T etc in the same boat as test, tren, deca etc.
I mean to do so is to consider someone on PH's capable of competing with the Mr Olympias of this world. A steroid is a specific compound, or compound type that has a distinct physiological effect on the human bodys endocrine balance. A prohormone is simply a chemical or nutrient that has an indirect effect on the bodies hormone levels, ZMA as a supplement is still a prohormone, it just isnt classed as such in the popular press.
The fact remains that whilst i agree with your sentiment, in tested competition no drug should be used that manipulates hormone levels, ie powerlifting. In bodybuilding i think the distinction must be drawn betwenn thos substances technically classed as 'Anabolic Steroids ' and all other types. So going back to my initial comment, yes i would call skip lacour natty even if he had taken PH's however im fairly sure he hasnt, he's ultra dedicated to being all natural, it just wouldnt make sense.