The appeal of CMU’s reCAPTCHA spam prevention application isn’t the protection; It is the excavation of collective intelligence. Irresistible as that may be to a complex systems guy, I’m not going to install the plug-in on BlogSchmog. Until this blog grows to a point where readers comment in long threads, I don’t think there is a reason to panic by adding CAPTCHA. And without CAPTCHA, there is no argument for reCAPTCHA.