Massive Spam - 2.3.2

Our guestbook is getting slammed with spam. We've implimented the fixes listed on this page but more keeps coming.

Any ideas / tips on how to stop this? We will need to pull the plug if we can't fix it.

Which anti spam methods have you implemented?

Human Verification is the best mix between simplicity and effectiveness

In addition to implementing the anti-spam methods, I think it is a good idea to edit the language file and re-phrase the terms that spammers and hackers search for, like "here you can leave your mark." I like to make all of the wording unique for each site. Also, keep the guestbook from being indexed by the search engines by adding a line to the robots.txt file:

User-agent: *
Disallow: /guestbook/

It's usually the text from the footer they search for Advanced Guestbook.