Blankenship is a part of one of the two elite groups of hackers in the 80s- Legion of Doom.
He claims to be the author of The Hacker Manifesto, saying that the document was written shortly after his arrest in 1986. It says that the only offense the hacker’s curiosity.
The Manifesto is considered a moral code of the hacker and was quoted in the Hollywood movie “Hackers” starring Angelina Jolie.
Blankenship was hired by Steve Jackson Games in 1989. He authored the cyberpunk role-playing sourcebook GURPS Cyberpunk, the manuscript of which was seized in a1990raid of Steve Jackson Games headquarters by the US Secret Service.
The raid resulted in the subsequent legal case Steve Jackson Games, Inc.v.United States Secret Service.