Beware that in some cases, that's still a net gain for the proprietary vendor: if you weren't able to pay much for, say, Photoshop, better to have you as a Photoshop user who will buy it at some later date, recommend it to your friends, and otherwise participate in the Photoshop using community, rather than, say, learn Gimp on Linux.
This is true, but there are many people who will always pirate no matter what. I know people who pirate everything from Photoshop and Windows to music and movies, not because they /can't/ pay, but because they simply don't want to.
I agree that it's not just about free software. Open source is a great movement for expression and challenges you to grow. But at the same time, aren't you sick of big companies making us pay for crappy software...uh um windows vista?
Last I checked, you're free to _not_ buy Vista. Buy a Mac. Buy a pre-installed Linux box. Buy your roommate's cousins used Pentium 4 w/o an OS and have your way with it.
Err, that's not really the point of free software. The free software movement is more about freedom than not paying money (libre vs gratis).
You really want to stick it to the man? Pirate proprietary pay-for software. But you wouldn't want to do anything illegal now, would you?