‘The most important indication of bias is your own feelings,” the University of Michigan advises students. It then urges them to report on their peers, anonymously if they prefer, “and to encourage others to report if they have been the target or witness of a bias incident.”

The Bias Response Team is there, ready to investigate and mete out justice. More than 200 American campuses have established similar administrative offices to handle alleged acts of “bias” that violate no law. A federal lawsuit filed Tuesday against the...