Protests on college campuses are becoming more sophisticated and more often staged by conservative students. Some conservatives say activism is growing because of a national network reaching out to students who've felt too threatened in the past to speak up on liberal campuses. "The tides are turning on college campuses," said Jason Mattera, spokesman for the conservative Young America's Foundation in Herndon, Va. "Conservative students will not take liberal garbage anymore." At the University of Colorado at Boulder, student Republicans made national news by holding an anti-affirmative-action bake sale where the "suggested donation" for a cookie depended on the race...