If AAS were no longer a controlled substance and legalized across the board, so many morons would ruin such a great thing. Some people wouldn't use any moderation or follow instruction and cause major damage to their bodies (i.e. 'hey ephedra works, lets take over 100mg a day!'). The line, "more is better" would be in effect.
And how long would it take for a couple of geeks that overdo AAS to go to jail for beating or killing their girlfriends and then blame it on AAS. The media would run with it and AAS would be illegal all over again.