Blame Wiseguys! They found a way to game the reCaptcha system by generating fake requests on Facebook to obtain the captcha IDs. They obtained all the system captchas, solved them, and then used a massive botnet to purchase tickets to music and sporting events. Genius.
http://www.wired.com/threatlevel/2010/0 ... -indicted/
CISSP, GCIH, GCIA, C|EH, Sec+, Net+, MCP