You know the old adage not to talk about politics or religion in polite company? It used to be a matter of etiquette, but it’s now an imperative if you want to keep your job.

Three out of five employees worry that expressing religious or political viewpoints, even respectfully, would lead to negative consequences at work, according to an Alliance Defending Freedom survey. The organization last fall gathered data from more than 3,000 workers across various disciplines, and its recently published findings were chilling.