"In 2008, fraternity members photographed themselves in front of the Yale Women’s Center with a poster reading, “We Love Yale Sluts.” In 2009, a widely e-mailed “preseason scouting report” rated the desirability of about 50 newly arrived freshman women by the number of drinks a man would need in order to have sex with them. And in October, fraternity pledges paraded through a residential quadrangle chanting: “No means yes!” Catherine Sheard, a junior from Canton, N.Y., heard the chants while studying, and reacted the way many students have. “I thought it was really obnoxious and closed the window,” she said. Suddenly, however, these episodes have the campus in a state of high alert. Yale acknowledged last week that the Department of Education’s Office for Civil Rights was investigating a complaint filed by 16 students and recent graduates, accusing the university of violating Title IX, the federal gender-equality law, by failing to eliminate a hostile sexual environment on campus. The complaint alleges a range of acts against women, from taunts to assaults, over seven years....Conor Crawford, a junior from Des Moines, said he had detected a tolerance on campus for crude comments about women that contrasted with a greater deference shown to gay and minority students. “There are a lot of close female friends I have here who have felt threatened,” he said. “You can hear the same language in some all-male suites, with the word ‘bitch’ used a lot and just general objectification.”"