I think Hollywood did a lot to aid piracy actually, as for many years they got their anti-piracy PR campaign horrifically wrong, and it all blew up in their face.
Hollywood came out with some really aggressive anti-piracy campaigns, that were very much zero tolerance. They told people that downloaders were thieves, said that if we catch you we'll sue you, or at least cut off your internet supply.
And in fact they did a lot of what they promised. But what happened was that the main culprits of illegal downloading were kiRAB in there young teens. And newspaper reports started coming out of studios sending aggressive lawyer notices to 12 year old girls, and the parents of young teenagers being told to pay up $10,000 fines. This unnerved the public a lot as studios came across as bullys
They then tried a more softly approach saying how Piracy is slowly killing the industry, and all those great cinematic moments you like will die if people keep downloading. But the problem was they were now being hypocritical, you would actually see in Variety and Empire magazine anti-piracy adverts saying the industry was on the verge of death next to news stories like 'Spiderman 2 has biggest movie opening of all time' or 'Iron Man grosses over $1 billion'. So the studios came across as liars.
Then they decided to come across as humorous and more informal. Over here in the UK was released one of the worst marketing drives ever. The Knock Off Nigel adverts, The idea behind them was to stain the image of the downloader not as a bedroom rebel sticking it to greedy corporations, but a tight fisted loser who doesn't pull his weight. What they got really wrong here is they slated being frugal in an era where frugality is really trendy. Primark, Aldi, 99p stores are really popular at the moment, so why are they picking on 'nigel' for being like everyone else? Also although light, the adverts had people humiliating someone and taunting him so they came across as a bit mean spirited.
Sadly the powers that be used fear and negative advertising, which just made them look greedy and paranoid. They didn't learn from history. In the 1950s Hollywood was under attack from cheap television sets entering the home. Attendances fell as people didn't need to leave the home anymore for dramatic entertainment. So they got together and thought of wonderful techniques like Cinemascope, VistaVision, Widescreen, 3D, and coaxed audiences back the positive way, by showing them spectacular things that made them want to go to the cinema again. In a sense they've now done that with modern 3D, but their negative campaigning really was a disaster.
(apologies for message length)