In 1980, Cameron left the University of Nebraska and took up private practice as a psychologist in Lincoln, Nebraska. In 1982, when the Lincoln city council asked residents to vote on a proposal to ban discrimination based on sexual orientation, Cameron led the opposition as chairman of the Committee to Oppose Special Rights for Homosexuals. Despite his earlier moderate position on teenage relationships, Cameron had come to take a hard-line stance on the topic of homosexuality. He has stated that his approach, emphasizing the harms he believed to be caused by homosexual behavior and its acceptance, was influenced by his work on the "lethal" behavior of smokers.