Do you realize how petty it would be to rat out someone you don't even know on the internets all because someone is breaking copyright law over a $79.00 piece of software? I doubt Apple would try to enforce it, because the costs to themselves would far outweigh the gains.
Adobe Photoshop is one such software that is highly pirated. Instead of dropping the price, however, in order to sell more copies, they hike the price and claim that only professionals should use it (and only professionals and rich amateurs could afford it). Piracy tends to come hand and hand with absurd pricing. And instead of Adobe realizing this, they flick people off and raise their prices substantially.
Piracy of Adobe CS4 is a protest to the outrageous behavior of Adobe in marketing their software. Drop the prices to about which virtually everyone can afford, and see their profits increase.
Take all the people creating flash videos from Newgrounds, AlbinoBlacksheep, EbaumsWorld, etc (who a majority of these flash animationists utilize these stolen applications), and provide them with an inexpensive, full range suite, and see how Adobe's prospects are. My guess would be higher.
As for music, you'd be surprised how often the RIAA goes after people who download songs that have been released onto P2P by the bands themselves.