In 2000, many media critics had a fit when they learned that TV entertainment executives had negotiated with the federal government to place anti-drug messages directly into their programs to avoid having to air free public-service announcements that would cut into their profits. Now Viacom, the parent company of CBS, UPN, Nickelodeon, MTV, VH-1, and Showtime, is at it again. This time, however, it’s for a noble cause, the "public interest," not ad savings. Viacom has joined with the liberal Kaiser Family Foundation for a "public education initiative." Viacom is touting that its programs on various networks would "incorporate HIV/AIDS...