I have a drupal 6 site. I'm using both Mollom and Spamicide.
Mollom is doing a great job at stopping spam comments but spambots are registering at an extremely high rate over 6 per minute.
Registration uses a captcha from Mollom and Spamicide but they seem to be going right through both. Spamicide slowed them down for about half a day but now that seems to be doing nothing.
Additionally, about 80% of the spambot accounts are validating their accounts through email - they create tons hotmail accounts with generic names.
Any ideas or recommendations on stemming the tide?
I've been trying to find a way of automatically blocking IPs that are throwing a high number of registrations or other suspect activity.