Welcome to a whole new way of keeping your blog, forum, guestbook, wiki or content management system free of link spam. Bad Behavior is a PHP-based solution for blocking link spam and the robots which deliver it.
Bad Behavior complements other link spam solutions by acting as a gatekeeper, preventing spammers from ever delivering their junk, and in many cases, from ever reading your site in the first place. This keeps your site’s load down, makes your site logs cleaner, and can help prevent denial of service conditions caused by spammers.
Bad Behavior is available natively for WordPress, MediaWiki, Drupal, ExpressionEngine, and LifeType, and people have successfully made it work with Movable Type, phpBB, and many other packages.
The core of Bad Behavior is free software released under the GNU General Public License. (On some non-free platforms, special license terms exist for Bad Behavior’s platform connector.) If you have created a platform connector for a new platform and want to contribute it to the community, you can do so here. You can also contribute to Bad Behavior’s development, even if you don’t know anything about programming.