Usually I use Google for search. Over the last few months most of the top search results I get are for sites that only seem to exist to scrape others. For example these ones scrape Microsoft's forums: Go4Answers, MSDN.iTags.Org, Tech-Archive, etc...
I only ever want to see the source content in search results and never want to see these types of sites.
Google Custom Search and its filtering options looked good initially but the results page lacks so many of the features of the standard Google search engine, I've found myself avoiding it.
Is there a good way to banish these types of sites?