Over 450 U.S. colleges and universities, public and private, maintain some form of a reporting system aimed at policing campus speech, according to a new report from a campus free speech organization.

Speech First found that, out of 821 institutions, 454 have a system for reporting incidents of “bias” to school administrators, who would then be empowered to investigate such incidents and, in some cases, take punitive action against the offending party.