I've downloaded a lot of video games. I started back when I got an Amiga 500 about two decades ago. Video games have been a large part of my life during this period, probably to an unhealthy level at times. The constant supply of new titles provided to me by piracy has fed this obsession.
Now that I have a much higher disposable income what do you think I spend it on? On my main interest of course - video games.
Preventing my piracy would not have resulted in any additional sales for the industry, it's already got everything it could out of me. Preventing my piracy would only have helped break my obsession - leading to me spending my money elsewhere.
Although I have pirated games, I find it hard to buy into the argument that I'm hurting the industry. I've spent a lot of money of video games, and I don't forsee that changing much in the future.