Drupal Anti-spam Registration Question
Last year I had to add an anti-spam question to my PHPBB forum to prevent spam bots from signing up and wreaking havoc. Lately the same bot problem has crept up on a site I have running Drupal 4.7.x. So I resorted to the same solution, though this one is implemented as a Drupal module. It is very simple…the only thing you configure is the question and answer you want to use. Click here to see it, and follow the instructions in the comments. I hope it helps you.