Drugs!
Fear and Loathing in Las Vegas is one of my favorite movies and I like some of Hunter's books but he is a nutjob, no doubt about it. A counter culture vampire who never left the 60's. The fact that he is still alive is amazing, he must have one hell of a tolerance to hard drugs!
Its easy to ignore his babblings about Nixon but when he pops up babbling about Bush its harder to ignore. Just go back to you're cabin and stay there Hunter. Please.
Like a poster above said, he is amusing until he is serious. One thing is for sure, he may well have the WORST fashion sense of any man in America! haha.