Cultural CAPTCHAs
CAPTCHAs, those squiggly and frustrating puzzles that many Web sites require users to solve before registering or leaving comments, are designed to block automated activity and deter spammers. But for some Russian-language forums that cater to spammers and other miscreants, CAPTCHAs may also be part of a vetting process designed to frustrate foreign newbie hackers and investigators.
