Have you read the dozen or so other articles from his Reagan era work where he opposed bussing, Affirm. Action, Roe v Wade, or his later work where he opposed and ruled against the EPA, or where he took a restrictive view of the Commerce Clause, or his recent rulings where he upheld military tribunals for terrorists?
I think pro bono work says more about his personal philosophy. It's a positive that he ruled the way he did against the EPA and about the Commerce Clause but I admit I'm more concerned with social issues and the right of the people to determine those.