piracy is bad... if it harms the person who is being pirated.
example, the last pumpkins lp (Machina 2, the friends and enemies of modern music) would not get released by their record company because the record company thought it could get better sales if it waited another 6 months. well the band was splitting up and wanted to release a final lp, the record label said no.
In the end the pumpkins pressed 25 copies on vinyl (which is legal apparently, since the record label had originally said no CDs) and then sent the copies to some prominent DJs and so on. Three of them had broadband internet, one of them had his record player hooked up to his computer. Within days there were tons of sites with mp3s of this album (which is a double lp with three 10" eps as well) free to download, EMI were pissed off to fuck but the smashing pumpkins have been very vocally in favour of this. They put the mp3s on their own site!
Now there are a lot of bands that said you could bootleg their stuff (green day, radiohead & grateful dead spring to mind) and basically what i am saying is that live music being circulated does not harm sales of studio lps.
Each case should be taken on its own merits but really, at the end of the day if there's a good reason not to pirate, then it's wrong, if not, then it isn't.
windows for example, the reason not to pirate windows CDs is that it is shit software and pirating it enables it to saturate the minds of more and more hapless computer novices round the world. If M$ enforced their copyright thoroughly, there would be tons of countries in the world who would be using EXCLUSIVELY free systems and software. M$ know this and this is why they allow their stuff to be pirated hugely in Thailand, et c.
There's good reasons for and against in all cases.
I have pirated more music in my time than i will likely ever listen to, but i have spent thousands on records of bands i would never have heard of if not for home taping et c.