For all the amusement Melky Cabrera's clown-car antics may provide, using his special flavor of idiocy as a launching point for endless "baseball's not serious about steroids" screeds is exactly the sort of simple-minded concern trolling you'd expect from ESPN radio. These are the same geniuses who defended Brian Cushing to the death, after all, because he played football, and apparently no one who plays football would ever have interest in getting bigger, stronger, faster, or more muscular - unlike baseball players.
In a sense, baseball can't win with these bozos. If the drug testing program doesn't catch anyone, it's ineffective. If it does catch someone, then it's evidence that the program isn't working. The narrative is set and all that's left is to fill in the blanks.