the RIAA seems to be the last organization to understand that a small amount of piracy is actually beneficial. most artists know this, many software/games developers know this, but the RIAA is still keeping their head in the sand.
we've all heard rumours of the study that found that pirating is primarily used for "try before you buy" and pirates spend much more on movies/music/games than the non-pirate (true in my case), or that record labels got hit with 7% decline in revenue shortly after napster was taken down. true or not, the fact remains piracy IS advertising.
when people pirate movies/music/games and enjoy them there's a chance they'll go BUY a legit copy that they wouldn't have otherwise, and even if they don't buy it they still advertise to their peers how enjoyable that movie/album/game is who, in turn, might buy it.
hell, i've even heard M$ wants a balance of upwards of 30% of their software to be pirated because it helps ensure their software dominance. true or not, it makes sense. everyone has M$ office because everyone else does, even if only most copies out there are genuine.