I had a character on City of Heroes named 'Clerisy', which is a word for the higher echelon of intelligence in society; scientists, philosophers, writers, all that sort of thing. He was one of those guys who took Idiocracy as a warning, and decided the world needed to be smarter by any means necessary, so it suited him (as did the fact it sounded like 'heresy'). He eventually became my main character, and so the name people started calling me. That led me to eventually start using a modified version as a username both on CoH and elsewhere.