I'm starting to get to a point where I think people are talking to much about scrapers stealing their content.
Seriously, are scrapers (dup content) killing you?
1)Yes, they are killing your website because you don't know how to do on page optimization.
a) If a scraper with a backlink profile weaker than yours can really outrank you, then that's your fault. Blame yourself on that one.
I have a site that has THIN, THIN CONTENT. It ranks PERFECT. I have SPAM SITES and I have Quality Sites that PEOPLE LOVE.... yes, I mingle with darth vader with some properties. None of my sites have been hit by panda.
If you really think duplicate content is your problem, it means your site is an ugly ducking when it comes to optimization.
Wikipedia stays on top for it's content: "Ethanol fermentation, the production of ethanol for use in food, alcoholic beverage, fuel and industry"
Think long and hard