George Mason University economist Walter Williams notes in his latest column a number of problems on today’s college campuses, including a growing disrespect for the free flow of ideas.

The average person would think that the major task of colleges is to educate and advance human knowledge. The best way to do that is to have competition in the marketplace of ideas. But Michael Yaki, head of the U.S. Commission on Civil Rights, disagrees. During a July 5briefing on sexual harassment law in education, Yaki explained that college free speech restrictions are necessary because adolescent and young adult brains process information differently than adult brains.

Fortunately, the Foundation for Individual Rights in Education has waged a successful campaign against college restrictions on free speech. Some of its past victories include eliminating restrictions such as Bowdoin College’s ban on jokes and stories “experienced by others as harassing”; Brown University’s ban on “verbal behavior” that produced “feelings of impotence, anger or disenfranchisement,” whether “unintentional or intentional”; the University of Connecticut’s absurd ban of “inappropriately directed laughter”; and Colby College’s ban on any speech that could lead to a loss of self-esteem. Some colleges sought to protect female students. Bryn Mawr College banned “suggestive looks,” and “unwelcome flirtations” were not allowed at Haverford College.

Greg Lukianoff, president of FIRE and author of “Unlearning Liberty,” argues that campus censorship is contributing to an atmosphere of stifled discourse. In 2010, an Association of American Colleges and Universities study found that only 17 percent of professors strongly agreed with the statement that it is “safe to hold unpopular positions on campus.” Only 30 percent of college seniors strongly agreed with that statement. The First Amendment Center’s annual survey found that a startling 47 percent of young people believe that the First Amendment “goes too far.”

The bottom line is that many colleges have lost sight of their basic educational mission of teaching young people critical thinking skills, and they’re failing at that mission at higher and higher costs to parents and taxpayers.