I’ve finally upgraded nimrodel.net and BLOGGED to wordpress 1.5 and the best comment spam plugin I’ve tested is Bad Behavior. Bad Behavior was designed and built by watching actual spambots which harvested email addresses, posted comment spam, and used fake referrers. By logging their entire HTTP requests and comparing them to HTTP requests of legitimate users, it is possible to detect most spambots. Bad Behavior blocks spambots with a 412 error. By preventing spambots and other malicious bots from ever accessing any of your pages, your bandwidth usage will drop significantly. That’s a bonus!
Bad Behavior actually works. In less than 5 hours after installation, it blocked 300 bot attempts.
