The dozens of students who gathered in a stretch of the University of Rochester's elaborate tunnel system on a recent Sunday night wore all black, save for the blue surgical masks over their mouths. They were in battle fatigues for the latest salvo in a series of conflicts on campus that had been simmering for months over opposing views on all things China – the Hong Kong protests, the status of Taiwan and Tibet, democracy, and human rights. They came armed with paint, brushes, and rollers and