Mephisto Plugin: Inverse Captcha for Comments (anti-spam)
Absolutely no blog comment spam for five months and counting! Impossible?
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:
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