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The sitcom Newsradio parodied this kind of overreaction to naughty words in rap over ten years ago, when Phil Hartman's character goes on an on-air crusade against rap lyrics (and the joke then was that he was ten years behind the times in his outrage.)
It's on youtube in three parts: here's a link to the first part, see at about six minutes in.
http://www.youtube.com/watch?v=2i0nxcRw850