I really must write a blog piece about this. It would go something like:
Hey webmasters, I understand why you started using captcha, I've advocated it for years after some frustrating experience fighting out-of-control spam fires. But this guy has some better ideas:
http://ezinearticles.com/?Captchas-Considered-Harmful---Why-Captchas-Are-Bad-And-How-You-Can-Do-Better&id=1104207TL;DR trick bots into revealing that they're not humans, instead of treating users as guilty until proven human.
