Apparently, through the use of a DMCA (Digital Millennium Copyright Act) complaint, you can have sites thrown out of Yahoo’s search index. If you file a DMCA report against a site, Yahoo will remove the “offending” site from Yahoo Search altogether, leaving no trace of the site in its index.
Yahoo! Talks BlackHat Optimization And Search As Media
I had lunch with Tim Mayer of Yahoo yesterday. I’d heard he was “looking for me,” at PubCon one night in the hotel bar, and figured it was because we broke news on the SiteMatch product a little earlier than Yahoo would have liked. So I kind of avoided him after that.