I'm not really pro or anti piracy, I think we have to move beyond somehow. One of the most powerful features of digital works is the ability to endlessly reproduce them for a minimal cost. Before this though, I was pirating VHS tapes and casettes as a kid and didn't really see it as harming anyone. I think I was wrong about that, but I'm not positive. I don't pirate anymore, as I've found plenty of sources that let me download legitimately more media than I could ever listen to or watch. I also still try-before-I-buy thanks to seeing youtube clips etc.
I think overall copying is positive as it allows a grand and rapid spread of art and culture at a pace never seen before. Finding a way to utilise that, like open source and creative commons do, while still adequately compensating artists would be my goal. I'd say I'm anti-piracy, but pro-copying.