The entertainment industry urged the U.S. Supreme Court Monday afternoon not to give the companies developing peer-to-peer (P2P) music file swapping software a "perpetual free pass" to engage in "mind-boggling" copyright infringement.

In a 67-page brief filed in advance of the March 29 Supreme Court oral arguments in MGM vs. Grokster, attorneys for the music and movie studios claim Grokster exploits "this massive infringement for profit, and petitioners are suffering extreme harms as a consequence."

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