"If you live long enough, the venerability factor creeps in; you get accused of things you never did and praised for virtues you never had." - I.F. Stone
I liked Stone's defense of ancient Athenian democracy: http://www.chss.montclair.edu/english/furr/essays/ifstoneonsocrates.html
Despite his seemingly 'independent' intellectual stance, I.F. Stone may have been revealed by the "Venona decrypts" to be a paid Soviet "agent of influence." This is still disputed by his followers, and I certainly haven't waded through all that stuff, but it has been discussed in various places, such as:
http://capmag.com/article.asp?ID=3010
"...Stone was a highly regarded "independent" journalist and his newsletter was always exposing things about Sen. Joseph McCarthy and others who warned against Communist spies and agents of influence. The problem was that I.F. Stone was a Soviet agent of influence, financed by the Kremlin."