Before attaching too much weight to such reports you'd do well to read David Brock's 'Blinded By the Right'.
http://en.wikipedia.org/wiki/Blinded_by_the_Right
That work demonstrates that people who take a stand against 'the establishment' are often subject to character assassination.
Brock's work demonstrated just how those processes operate.
Al Gore is a environmental sustainability crusader and has incurred the wrath of many powerful interest groups. His persistence partially explains why he won his Nobel prize!
