Here's the problem. The HoF is already full of players who took PED's. Starting at least in the 1960's, lots of players were using PED's. In his autobiography, Hank Aaron admitted to using amphetamines toward the end of his career.
(In 1973, at the age of 39, Hank had his best HR to at bat ratio of his entire career. 40 HR's in 392 AB's).
You can see the problem baseball has. Where do you draw the line ? Was it ok to take amphetamines but not steroids ? Penalise only those who have tested positive for a banned substance ? Very few of the players who have taken PED's have tested positive.
As you can see, I have plenty of questions but very few good answers.
One writer's dilemma
http://espn.go.com/mlb/story/_/id/8769398/a-writer-gives-hall-fame-vote