There’s been an amazing amount of posturing and speechifying over Janet Jackson’s breast. “But even as the TV networks race to delete images of nudity and sex from such prime-time dramas as ER and Without a Trace in an effort to show that they can police themselves, media historians and analysts say real, lasting change is unlikely. As dramatic as the pictures and soundbites coming out of Washington today might be, it will be mostly political posturing, the experts say, merely the latest movement in a dance between Hollywood and Washington that started with the Communications Act of 1934.”