Mephisto Plugin: Inverse Captcha for Comments (anti-spam)

Absolutely no blog comment spam for five months and counting! Impossible?

No. It actually works.

Checkout this highly efficient anti-comment-spam trick and add an "outer floodgate" to Mephistos already very good spam-protection (Akismet).

This plugin easily extends your Mephisto blog with an "inverse captcha" mechanism which relies exclusively on CSS. No JS, no user action required. It even falls back/plays nice with non-CSS clients.

Here's the code:

http://svn.artweb-design.de/stuff/mephisto/mephisto_inverse_captcha/.

You can read more about this plugin here:

• The initial experimental implementation: How to add a floodgate to Mephisto's nearly perfect spam protection
• Follow-up article about the results: Report: 30 days with no blog spam on Mephisto!
• Now implemented as a regular Mephisto Plugin: Inverse Captcha Anti-Comment-Spam Technique