I have seen many fellow webmasters complaining about their content that have been scraped.The solution in order to stop that new fashion is very simple.
If you are using feedburner modify your feeds with a summary of your content and a teaser with a written link back to your blog or site (no html allowed)
Go to feedburner click on the Optimise link and at the menu to the left go to Sumarry burner and modify your feed.
I hope that helps those that don't yet know this option.