5. Philip K. Dick wrote all your favorite sci-fi stories, took all the drugs
Blade Runner. Total Recall. Minority Report. Total Recall again.
Even if you've never read a Philip K. Dick novel or story, you know his work simply by the classic movies it inspired. Dick wrote about conspiracies, paranoia, and the way in which the reality we live in is a lie. In other words, the literary equivalent of a stoner's rantings.
This should all make sense, since Dick's ideas had a lot to do with the ridiculous amount of drugs he experimented with. Throughout his life, Dick used amphetamines, weed, acid, mescaline, and PCP. His heavy intake fueled his creativity, but also made him just as paranoid as his characters, convinced that the CIA, Richard Nixon, and a giant metallic face in the sky (really) were out to get him.
Remember that line from Blade Runner? "I've seen things you people wouldn't believe." Yeah, no shit, dude.