NPR's Larry Abramson reports on oral arguments today before the Supreme Court. Playboy Enterprises asked the justices to strike down a law that requires that sexually explicit cable channels be completely blocked from nonsubscribing households. Proponents of the law say scrambled signals still allow glimpses of the video and a lot of the audio to come through. The law is intended to shield children from exposure to that programming. Playboy says the law goes too far and that parents can take the initiative to have the channel completely blocked from their service.