Worrying things have been happening on US campuses of late. While most of us are now familiar with the campus censors’ vocabulary of ‘trigger warnings’ and ‘microaggressions’, authoritarian student behaviour has recently taken an even more sinister turn. At Middlebury College, Vermont, protesting students assaulted an academic who tried to protect speaker Charles Murray, because they considered Murray racist. In video clips Yale students were shown screaming at a professor who dared to suggest that Halloween costumes should not be policed for offensiveness. And at Evergreen College, Washington, when a professor refused to participate in a day of absence in which white students and staff were asked to leave campus for a day to raise awareness about race and equity, a student mob occupied the college president’s office and the campus ended up on lockdown.