DVD recorders are here. But the movie industry doesn’t seem to be greatly concerned. “The reason? Hollywood has learned from the piracy woes of its music-industry cousins. Unlike music CDs, DVD movies have encryption codes that make them almost impossible to burn. And the Motion Picture Association of America (MPAA) has aggressively prosecuted pirates like Norwegian teenager “DVD John” Johansen, who publicized on the Net the copyright-protection code of a range of DVDs.”