The Supreme Court could weigh in on the constitutionality of so-called bias response teams at colleges in the U.S., which free speech organizations say are used to discriminate against political viewpoints and to chill free speech.

Bias response teams are systems created to monitor alleged biased speech on college campuses, which often end up with students reporting other students for politically disfavored speech, according to the Foundation for Individual Rights and Expression (FIRE). Students are then brought before administrators in what can be a long-drawn-out process that discourages students from speaking their minds and expressing disfavored viewpoints, which free speech advocates argue violates the First Amendment.

The Alumni Free Speech Alliance, a group of over a dozen free speech alumni organizations, alleges that bias response teams are used to target individuals and often cause students to self-censor, resulting in less intellectual freedom on campuses. The groups filed an amicus brief to the Supreme Court in support of advocate group Speech First, which is suing Virginia Tech over its bias-response team.