Behavior analysts historically been committed to science and the scientific procedure for studying human behavior. The major behavioral organizations, ABAI and BACB, have set forth standards of conduct that require behavior analysts to use effective treatment procedures. The BACB's Guidelines for Responsible Conduct specifically state that behavior analysts must use scientifically supported most effective treatments. However, there are a number of BCBAs who have been found using practices that are pseudoscientific or fads. This symposium will address this concern by reviewing criteria for evidence to which behavior analysts should adhere, providing examples of behaviorists behaving beautifully, and behaviorists behaving not so well, and offering strategies to convince these behavior analysts to once again behave according to our scientific principles, or how to deal with such transgressions.