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Oh, I agree. But I'd argue a working captcha is at least somewhat preferable to a broken poorly made one, even if they can both be trivially mechanically-turked.

Sadly the only solution I can see to the overall 'Captchas are broken' problem that's current available is forcing people to link to an established identity like a Google account or a Facebook account. This then of course recurses to how can you prevent automated Google/Facebook sign ups. I wonder whether Google/Facebook could use some kind of heuristic for detecting genuine users of the service? (maybe a Facebook account that plays games or uploads photos regularly, or has attended a few events could be a threshold?)




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