The arrival of filtering required spammers to switch strategy. The carpetbaggers of spam’s youth left the scene, ushering in criminal sophisticates who set to work spoofing the filters. The game had changed. As Finn Brunton recounts in his brilliant history of spam, excerpted here for a second day: “Rather than sales pitches for goods or sites, they [messages] could be used for phishing, identity theft, credit card scams, and infecting the recipient’s computer with viruses, worms, adware, and other forms of dangerous and crooked malware. A successful spam message could net many thousands of dollars, rather than $5 or $10 plus whatever the spammer might make selling off their good addresses to other spammers.” Brunton illustrates the ingenuity of this transformation by detailing the highly inventive litspam--the hijacking of entire texts of Borges or Conan Doyle to waltz past spam filtering algorithms.