On the first day of classes at the University of Texas in this city that revels in its own oddball creativity, students protested a law allowing concealed handguns on state college campuses by carrying something they thought was just as ridiculous and out of place: Thousands of sex toys. “These laws won’t protect anyone. The campus doesn’t want them,” said an organizer of the protest, Jessica Jin. “It’s absurd. So, I thought, we have to fight absurdity with absurdity.” On Wednesday, Ms. Jin, a recent graduate who majored in violin, helped distribute brightly colored dildos to hundreds of students gathered to protest the law that took effect Aug. 1.