"It's becoming more difficult for file-sharing sites to operate without getting into trouble both from the authorities and also lawsuits from copyright owners, " Ernesto Van Der Sar, editor of TorrentFreak told the BBC.

BBC: FileSonic cyberlocker offline after piracy complaints

Even with a broadband connection and a sophisticated file-sharing schema like BitTorrent, illegally downloading and swapping movies is far more difficult than trading songs.

FORBES: Michael Noer On Digital Entertainment