Will this reduce the spam?

Thanks to [Ignacio Segura](http://www.isegura.es/blog/stop-spam-your-site-being-invisible-honeytrap-drupal-comments-form) I have a new anti-spambot measure. Users won’t notice it (unless they browse with CSS turned off, or other such unusualness). Hopefully this will mean that a) I don’t have to “disapprove” loads of comment span every day, and b) I can allow anonymous commenting without having to approve it before it becomes visible.