As far a music goes:
The RIAA are a bunch of bloated, greed-seeking dinosaurs throwing tantrums. Their claims of losses are unsubstantiated, and they conveniently ignore studies that show P2P users actually buy more music than non users.
When I was a kid, we frequently traded mix tapes and borrowed albums to copy off and listen to... it was, and still is, the best free advertising a musical outfit can get. Now, since the whole bloody planet has gone lawsuit-happy, it's acceptable to litigate 12 year-old kids and colledge students just so that musicians can blame their public when they spew out mediocre material and cry about alleged 'lost revenues'.
Yes, stealing is wrong... but a little perspective on things would serve mankind far better; let kids listen to their favorite bands for free once in a while... and instead focus on the thousands of other issues that cause actual pain and suffering to those who can't help themselves. Rape, murder, hunger, disease, war, environmental time-bombs, torture, random acts of violence, terrorism, child pornography... these are all concerns, but they hardly compare in importance to slapping punitive damages on little Johnny for having a half-dozen Britney Spears songs on his computer!
As for other media...
People will gravetate towards legitimacy when a product shows merit, despite the fact that popularity also increases unlawful distribution.