I had this computer science professor about three years ago who would preach to us all the time. He liked to talk about what a terrible human being Abraham Lincoln was, how the world was going to have a universal currency and police force in the near future, and also that there was some conspiracy in place to put Hillary in the White House in '08 (and she will be the last US president).
The only positive thing about having this guy as a professor was that he gave the entire class (>500 students) an A grade because it was his last semester at the school, he was leaving to become a full-time whistleblower.