notthatwillsmith writes "We all know that Google purges known 'attack sites' — sites that deliver viruses, spyware, or other malware to visitors — from its index of searchable sites, but that doesn't stop the text ad giant from happily selling ads linking to those sites. One wouldn't think it would be any more difficult to cross-reference the list of purged sites with the list of advertisers than it was for the main search index, would it?" To be fair, the article says that Google shut down the ad when notified of it; and no other examples of linked malware are offered. Was this a one-time oversight?