On 22 January 2013 04:28, Matthew Flaschen mflaschen@wikimedia.org wrote:
On 01/21/2013 03:00 AM, David Gerard wrote:
Yes, but to count as successful it would have to block approximately all, I'd think.
That's dubious. Blocking all spambots is not the goal of any CAPTCHA. The goal is to significantly decrease spam, and thus to save human spam-fighters time.
Per the previous comments in this post, anything over 1% precision should be regarded as failure, and our Fancy Captcha was at 25% a year ago. So yeah, approximately all, and our captcha is well known to actually suck.
- s.