Dealing with Comment Spam
One of the first plugins I wanted to write for WordPress was a decent spam filter. At the time (late 2004) there were several plugins already out there, but they were all rules-based and I wanted something more adaptive. So I wrote a few simpler plugins for practice and soon abandoned the idea, since I really didn’t get much spam — or even many comments for that matter.
After a seven month absence, I came back here to find over 4000 comments in moderation, most of it spam. It took a week to sort through and clean that mess up, all to preserve the 5% of legitimate comments buried in there. Then after a 2 week vacation, I was stunned to see my empty moderation queue back up to 2700 comments. No rest for the wicked, I guess. (more...)