Use reCAPTCHA To Reduce Comment Spam
After viewing my comment moderation queue for the first time in a year, I was shocked by the volume of spam. I'm used to moderating spam on other sites, but didn't expect a similar volume here. Needless to say, the open source power of Drupal makes reCAPTCHA available for use as an installable module. After a few months I'll revisit the moderation queue and post the difference in volume I'm hoping for.