Most people here arguing that the "ethical side" of piracy is when the media is not available elsewhere. Or if it's available but at an abusive price/requirements. To which I agree.
But I also believe that culture shouldn't be only for those who can afford it. Books, movies, videogames, tvshows, education, science is what makes a society culturally rich. This is exactly why we have libraries. It's a public service. I've seen teens become avid consumers and incredibly knowledgeable in certain subjects, to the point that they are making a living because of it. Because the internet allow them to explore and grow. Without a pricetag nor preassure on their families.
Heck! Even I pirated almost everything in my teen years. Nowdays I pay for a lot of media. Don't get me wrong, we should be supporting artists. Always. If possible.
If it's not possible, go ahead just pirate it. Piracy it's just the best digital library in history. With a heavy euphemism attached: "piracy" (the act of attacking ships in order to sack them, kill people, rape people). It has a bad connotation on purpose. Don't fall for it.
Edit: punctuation
I don't know man. Where I live the law says it's not stealing. It says: legal to share, illegal to share for profit. On other words: legal to share, illegal to sell.