AN agency under contract with twitter conducted a study of Twitter spam and purchased Twitter accounts. The information revealed by this study was used to identify fraudulent twitter accounts, where they came from, the methods used to create them and some of the sellers of those accounts. The paper reveals that many of the fraudulent accounts were purchased here at Blackhat World. The paper names names and services that were selling those accounts, and sometimes shows how the same sellers, resold the same purchased accounts several times. The study is 16 pages, the title is "Trafficking Fraudulent Accounts: The Role of the Underground Market in Twitter Spam and Abuse, " and the link to that study is http://krebsonsecurity.com/wp-content/uploads/2013/08/USENIXtwitteraccountpaper.pdf. For anybody considering purchasing Twitter accounts, this paper is a "Must read." For anybody that creates those account, this paper is a "Should read." For those sellers that sell the same accounts: Shame on you. Happy reading.