I wish more people would have the courage and conviction to say this out loud. I notice many people speaking out against SOPA on the web or on TV, that always start with "While I do believe piracy is a serious problem,..." - even though they don't really mean it, and they are just saying it because they are afraid of being seen as "pro-piracy".
And I agree with Tim O'Reilly that the vast majority of "copies" being pirated online, would not be bought if they had no other alternative. That's just part of RIAA's and MPAA's bogus claims that every pirated copy is a lost sale. It couldn't be further from the truth.
If you want to test this just compare a Netflix' user consumption of movies or shows, or a Spotify user's consumption of songs every month, to an iTunes user's consumption who spends around $10 per month, and you'll notice that the consumption of the Netflix or Spotify user is a lot higher than that of the iTunes user.
Why is this happening? Because as more content is available to them, they will consume more content, but they are not willing to spend more money on content. Limiting availability to more content, or in this case "curbing piracy", will not result in more sales and more money, because the user will not be willing to spend more than they were already spending.