I'm not gonna be popular here with this viewpoint, but I'll chuck it up for discussion anyway:
I personally believe that if you pirate, you are in the mindframe that theft is completely fine if you can justify it in your own mind. "That price is too high, I'll just nab it off the shelf" kinda mentality.
Pirating is not theft, persay; if someone copies your homework, you don't lose your work. When this concept applied to businesses, the only thing being lost is opportunity for a sale. An opportunity is just that, not a tangible loss to the companies who have had their product pirated and torrented.
If a pirate doesn't have the funds to purchase the product, doesn't want to blindly go in and buy a product only to go through a refund process when they're not satisfied with it, or otherwise is unable or unwilling to get ahold of a particular file or product, there is no opportunity to lose in the first place. (Though the person who is unwilling, but able to purchase a product, is costing the company an opportunity for a profit. These people are the closest thing to thieves as you can be on the internet without sending malicious programs and worms to people to steal credit cards.)
This goes double for any media found on public domain, like Youtube. Once it enters the public domain, anyone who wants to listen to it can simply favorite the song, or arrange a playlist, and listen to the music at will.
On an unrelated note, I find it perfectly acceptable to pirate products of companies with asinine policies. (WMG, Anybody? Protecting things you have rights to from public domain is fine, but they have made a nuisance of themselves to more people than they could ever know, from messing with Youtubers' livelihoods to being a forerunner in SOPA) When you're indiscriminately punishing people who legitimately purchase your products, and lobbying to keep doing it, you deserve a hole in your profit margin. That's activism.