There is at least a small representation from several politial viewpoints but the author of the list needed to have more conviction to choose who he(they) thought should be on the list and in the order of importance, not because of "web" or periodical standings.
Leary was an addict who never came to terms with his addiction and used his degree to explain his compulsive use of drugs. He even admitted to using heroin and ketamine (animal tranquilizers). He was looking for a fix and wanted to sample all of it, even drugs that he knew to be self-destructive. He was busted for alchol while at military school.
Tom Wolfe wrote about Ken Kesey's Acid Tests in detail (in his first original book, one that wasn't just a collection of smaller pieces). Wolfe swears to this day that he did not use LSD and says that it would have compromised his objectivity. Leary never saw a conflict.
Was John Lennon an intellectual?
How about a list of "damned intellectuals"?
Ok, here's a start: Both Hayeks (Frederick and Salma)