Date: 03/19/05 (Java Web)    Keywords: spam

Overview A Plugin to bounce back referrer spam attempts; requires no upfront configuration, no mod-rewrite. It is like the strong silent bouncer at your favorite club. Tested only on WordPress 1.5. Should work with earlier versions. It does one job and does it well. Enough said. Background I was trying to block referrer spammer’s from my blog sites. I [...]

Source: http://blog.taragana.com/index.php/archive/word-press-1-5-plugin-referer-bouncer/