Well, in terms of music, if you hear any demo tracks and you like them, then you can buy them. The demo tracks are a WIN for the music industry, especially in internet, because the music producers asked to create a demo version of this track, which would attract every music lover. So I don't think the music companies would be interested in the piracy.
In terms of gaming, the problem in piracy lies between the borders. The publishers(Microsoft and Nintendo) are region-locked and all of the publishers, except of the PC publishers, are expensive. There are some gamers, who love a certain kind of game, i.e. I love the RPGs, especially the J-RPGs, who are sad to hear that some games won't come to PAL, worse to NTSC, including the region-lock system, will go to piracy to try importing them and enjoy them. Other gamers are really poor and can't invest themselves to buy a game they want to play, so they refer to the copy-right piracy, let alone the fucking tax, which doubles the game's price. Had the publishers know about it, they would go to a different way, which is the region-free system and the lowering of the price.
In terms of the movies, I dunno, but the equipment to make a good movie costs too much, let alone the actors, the technicians, the director, etc, etc, etc.
In terms of Internet, I'd agree to stop the pedophilia, because these kids are little souls. You have to respect them. Only an ill mind would go so far to psychologically traumatize them, so that's why we need this ACTA in a point to stop this shit, but I don't think this will happen anyway. -.-