Yes and no. While piracy is generally bad, it is considered a crime, and it is really hard to quantify the extent of the damage it causes, a certain level of piracy has some positive effect.
The most important thing is that piracy introduces a competition - manufacturers of digital goods must invest in quality to be competitive on the market (companies compete not only with other companies but also with the pirates). As we all know, competition is always good for the consumer (it lowers prices, increases quality etc.). On the other hand it lowers the revenue of a company, and it can even bring it to ruin.
Generally I would say that piracy is not bad, or not as bad as some people think. I vote "no".