Today the U.S. Supreme Court will hear arguments about what we should -- and should not -- hear or see on TV and radio.

The nation's television networks want the court to to overturn a decision from 1978 that upheld the Federal Communication Commission's power to regulate TV and radio content.

As the Associated Press reports:

The justices are hearing arguments Tuesday in a First Amendment case that pits the Obama administration against the nation's television networks. The material at issue includes the isolated use of expletives as well as fines against broadcasters who showed a woman's nude buttocks on a 2003 episode of ABC's "NYPD Blue."

Let's face it, people can find all sorts of foul language, sexual activity and graphic violence on the Internet and many cable stations.

In recent years, it seems that some violations have been punished and some have not. Cher dropped the f-bomb on an awards show in 2002; no one got fined. The TV show "NYPD Blue" showed a woman's buttocks in 2003 and stations that aired the show at the more "child-friendly" time of 9 p.m. got fines.

And who doesn't remember the huge flap over the Super Bowl halftime show in 2004, with the infamous Janet Jackson/Justin Timberlake "wardrobe malfunction?" (The FCC's $550,000 fine against CBS eventually was ruled unfair.)

What role do you think the government should have in policing the airwaves? Are there some "unsayable" words (with thanks to the late George Carlin) that should not be heard? And are there some things that should not be seen, or at least not be seen during certain hours?