At Vanderbilt University in Nashville, Tenn., a printer, suspected to have been hacked, spurted out anti-Semitic fliers in January.

At Central Michigan University in Mount Pleasant, Mich., an Adolf Hitler-themed Valentine’s Day card, unauthorized by the school’s College Republicans, made its way into a bag at one of the group’s meetings in February.

And at the University of Southern California in Los Angeles, a vendor was discovered to be selling items with swastika symbols before being asked to leave.

The three episodes are among more than 100 since the school year started in September that the Anti-Defamation League lists in a new report tracking efforts by white supremacists to recruit students on college campuses.