yeah, and the article states that its only fifteen percent effective. But with an unlimited number of tries it eventually gets through. You could always implement a captcha that allows three tries per ip per 15 minutes or something.
I think it would be worthwhile for your site still.
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While a standard engine is powered by a belt connected to the crankshaft, a turbo engine runs on its own exhaust steam, making it more energy efficient. -- CNN
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