N
nitrocan
Guest
wikipedia said:Circumvention
There are a few approaches to defeating CAPTCHAs: exploiting bugs in the implementation that allow the attacker to completely bypass the CAPTCHA, improving character recognition software, or using cheap human labor to process the tests.
Spammers to me, seem like humans and they aren't trying to fill all the forums with massive amount of spam. They just open one account, send a couple of messages and then disappear.