NEW YORK - Though decried by many gay-rights leaders, “outing†— the practice of exposing secretly gay public figures — is expanding into new terrain as Internet bloggers target congressional staffers, political strategists, even black clergy whose sermons and speeches contain anti-gay rhetoric. Few issues are as divisive within the gay community. Numerous gay organizations, such as the Human Rights Campaign and the Log Cabin Republicans, staunchly oppose outing, yet many other activists support it when the targets are public figures — or their aides — who work against gay rights or condemn homosexuality. “It’s not the gay thing that’s...