What used to be whispered on campuses is now broadcast, in the most cowardly way, for anyone with an Internet connection to see. Beverly Low, dean of first-year students at Colgate University, describes the phenomenon as an "electronic bathroom wall." The posts — which are often suffused with racism, sexism and homophobia — can be so vicious and juvenile that Ben Lieber, dean of students at Amherst College, likens them to "the worst of junior high."