SANTA BARBARA, Calif. – Should students about to read The Great Gatsby be forewarned about “a variety of scenes that reference gory, abusive and misogynistic violence,” as one Rutgers student proposed?

Would any book that addresses racism – like The Adventures of Huckleberry Finn or Things Fall Apart – have to be preceded by a note of caution?

Do sexual images from Greek mythology need to come with a viewer-beware label?

Colleges across the country have been wrestling with student requests for what are known as “trigger warnings,” explicit alerts that the material they are about to read or see in a classroom might upset them or, as some students assert, cause symptoms of post-traumatic stress disorder in victims of rape or in war veterans.

The warnings, which have their ideological roots in feminist thought, have gained the most traction at the University of California, Santa Barbara, where the student government formally called for them. But there have been similar requests from students at Oberlin College, Rutgers University, the University of Michigan, George Washington University and other schools.

The debate has left many academics fuming, saying that professors should be trusted to use common sense and that being provocative is part of their mandate. Trigger warnings, they say, suggest a certain fragility of mind that higher learning is meant to challenge, not embrace.

The warnings have been widely debated in intellectual circles and largely criticized in opinion magazines, newspaper editorials and academic email lists.

“Any kind of blanket trigger policy is inimical to academic freedom,” said Lisa Hajjar, a sociology professor at the university here, who often uses graphic depictions of torture in her courses about war. “Any student can request some sort of individual accommodation, but to say we need some kind of one-size-fits-all approach is totally wrong. The presumption there is that students should not be forced to deal with something that makes them uncomfortable is absurd or even dangerous.”

Bailey Loverin, a sophomore at Santa Barbara, said the idea for campuswide trigger warnings came to her in February after a professor showed a graphic film depicting rape. She said that she herself had been a victim of sexual abuse, and that although she had not felt threatened by the film, she had approached the professor after class, suggesting that students should have been warned.