In the same way that libraries defend the privacy rights of library users so should they respect library workers' privacy of thought. Diversity, Equity, and Inclusion (DEI) training, as it has been approached in recent years, impinges on privacy of thought and cognitive liberty. It is possible to see the profession's shift away from a privacy-defending approach to DEI training to a privacy-threatening approach through the concept of cultural competence, which is the subject of two American Library Association guidelines a decade apart. Because workplace trainings are an expression of an organization's philosophy of control, it is management's responsibility to foster privacy by design in the library. The right to freely choose the beliefs that comprise a library worker's worldview, and disclose them only as they choose, is freedom of thought. The right not to have one's beliefs interfered with without their consent is cognitive liberty. Each is a privacy right and must be defended in the library.