We pulled some disturbing numbers this past week about the amount of PC players currently playing Multiplayer (which was fantastic). What wasn't fantastic was the percentage of those numbers who were playing on stolen copies of the game on stolen / cracked CD keys of pirated copies (and that was only people playing online).
Not sure if I can share the exact numbers or percentage of PC players with you, but I'll check and see; if I can I'll update with them. As the amount of people who pirate PC games is astounding. It blows me away at the amount of people willing to steal games (or anything) simply because it's not physical or it's on the safety of the internet to do.
Unsurprised by these findings, kind of worries me that if this gets worse (and it most likely will), titles for the PC are going to go into decline. I think it's fair enough if you want to download a game to try it out for a bit to see if it's any good because sometimes demos are either so shit or contain some of the dullest moments from the full-game that you never quite know what to expect. Then you either buy the proper article or you delete the game from your hard-drive, there's no excuse for piracy here, the whole argument about downloaded music doesn't even come into this either.