Napster-baiting

Not that they knew this at the time it was being filmed, as practically every scene from the movie makes clear. Indeed, rather than look like they were about to return as triumphant conquerors, for most of its 160 minutes Some Kind of Monster portrays Metallica as being hopelessly at sea. Beginning, literally, with their equipment being loaded into the Presidio, and ending over two and a half years later with the band’s first tour since Jason Newsted’s departure, via the Napster-baiting debacle, the arrival of Dr Towle, James’ sudden retreat into painstakingly lengthy rehab, the appointment of a new bassist, and many other things neither Berlinger or Sinofsky could possibly have predicted, we get a real sense of how close Metallica was to imploding throughout the months and eventually years the album and movie were being made

What does Napster-baiting mean here? Context- Earlier in the book it is sad that Metllica sued Napster.