Whether you have a Web site or a blog, or both, you'll soon find yourself up against content theft. This occurs in various ways. Someone can republish ALL your content as their own, or "scrape" the content, usually via an RSS feed.
Although some writers don't mind their content being scraped, I completely agree with Amy Gahran at Contentious:
In a nutshell, someone who republishes your content without authorization is stealing from you. Don’t fall into the fallacy of, “It’s publicity, so it’s good for me.” If it’s a splog or otherwise unsavory site, and if they don’t even credit you or link back to you, then they’re getting all the benefit from content you’ve worked to create. With nothing for you. Plus, they’re probably damaging your reputation.The reputation-management aspect is what concerns me. I don't want my name and content to be associated with sleazy sites.
What can you do about scrapers? Not much, unfortunately. It's up to Google and the other search engines to manage splogs (spam blogs) but since they're gaining revenue from them, the incentive isn't there.