I'm still mixed.
On one side you aren't contributing to the production of a product that is not a necessity. The issue lies in the matter that it isn't physical, creating a different sense of ownership, but it still takes large quantities of money, time, and effort to create. Whether they are charging too much or not doesn't matter, as it is their own piece.
Then there is the matter that piracy can have some positive effects, such as spreading a product around. Along with the fact many times you would not purchase the product, meaning you have little effect on the market.
As someone who aspires to be a game programmer, and has talked to a few programmers, I would like to think my opinion has developed some. The problem is that reproduction of applications, once done, can easily be accomplished. No time in history beforehand has needed to deal with this type of dilemma.
One argument could be that it should work somewhat similarly to patents and such, where you make your money for a certain amount of time, then it is open to whatever (Please don't mention the current system's absurd lengths of time and abuse, as I am completely aware of it). What I find humorous is that some of the reasons it even exists deal with the fact that we have so many options to choose from. Obviously convenience, no-cost, no-downside, etc... are also part of it.
The matter of fact is that there are these massive, tremendous industries that can spend endless money. It makes it difficult to think that one's dollar makes a difference, but then even presupposing that this be true, there is the matter of ethics and morality of it. Although a game might only cost $1, the amount of time and effort that may have gone into it then go unrewarded while you still get to enjoy it.
I guess I really haven't taken a stance this entire post. If I had to say where I currently am, I suppose I am avoiding pirating games (which I will openly admit that it may be a bias as I hope to enter the industry, although with Indie companies you really should just buy) and movies (which is a different reason), but music I still struggle a bit with. I am not a huge music enthusiast, not to say I don't enjoy it. Part of it may just be that I tend to have difficulty comprehending what really goes into making a song, it could also deal with length. Once again though, I still watch anime and movies online at times.
Interesting Note - Technically, piracy has saved older games, music, and movies. for generations (not the exclusive answer to it, but it did happen this way) with the uploading of past material that would have otherwise just deteriorated.
TL

R - I don't pirate games or movies, still watch online sometimes though. Trying to get better with music.