It would be a bad idea!! look at what happend to the WBF!
The WBF had a much easier time with its policy, because Vince McMahon only had to test 13 guys (well, 14, if you counted Lex Luger).
Plus, McMahon went from one extreme (letting the bodybuilders inject whatever they wanted) to the other (testing them for everything but the kitchen sink, and testing them multiple times a month).
Plus, drug testing ain't cheap, especially if you want to be as extensive as Dr. Mauro Dipasquale, the man who ran the WBF's testing protocols, did.