I hear the Gaylord Perry argument a lot as well. Yes, he admitted doctoring the ball (other guys like Sutton were suspected of this as well), but I consider that gamesmanship more than cheating- in that the umpire could have and should have stopped it. Same thing as using a corked bat. These things were against the rules of the game, but were done right under the nose of the umpires. With steroids, how can you tell whether a guy has been sticking a syringe in his ass outside of a piss/blood test? The results are also much more dramatic, people use the 'You still need hand/eye coordination" argument a lot, but Canseco breaks down all the benefits in his book. the changes in not only muscle mass but 'twitch speed' are dramatic, how else could a stiff like Luis Gonzalez hit 57 home runs?