"Steroid Era" keeping Sosa out of the Hall of Fame?

Sammy Sosa hit his 600th career home run last night which brought up the debate of whether or not he is "hall worthy." Obviously, the only thing that is holding him back is the dark cloud that was the decade he played during. He is only the 5th player to reach 600 career home runs. His defense was never very good, nor his batting average, but only four other players have ever hit as many home runs, and no one hit as many as he did over 10,9,8,7, and 6-year stretches. His body added around 60 pounds of muscle between his start with the Rangers and his hey-day with the Cubs, however, there has been little evidence that has linked him to steroid usage. You may remember Rafael Palmeiro lying and Mark McGwire refusing to talk on Capitol Hill a couple of years ago, but many people forget that Sosa did not talk because of his poor excuse of "poor English." If it is steroid suspicions that causes you to believe that Sosa put up such great numbers, then I ask, at age 38, why he continues to be productive now that steroid testing policies are implemented? Perhaps it was not so much steroids that ballooned home run numbers in the 90's, but watered down pitching, increased weight-lifting technology, smaller ballparks, and a juiced baseball...