There can be a fine line; it depends on whom is doing the interpretion. But, theft is theft. Property rights and a internet liberty have no fine line, either. There needs to be a debate on what will be tolerable or not.
theft is theft, piracy ISN'T theft.
the industry see's
OMG my song was pirated 1million times i must have lost $20million in revenue!!!
when this isn't true.
The US is the only country doing some BS against piracy, hell, if it remmember in Russia it is LEGAL to download anything, as long as its for personal use.
techincally all you are doing is renting the thing you pirated it. unless you plan on keeping it. so unless netflix/blockbuster/libraries/Hulu/gamefly are illegal then piracy shouldn't be either.