This is a simple add-on that can help stop a lot of spambots out there. Adding a hidden honeypot field that normal users can not see but bots can, will help detect when a bot is trying to register. This can also be combined this this request: http://xenforo.com/community/threads/stop-bot-spam-via-altering-registration-fields.47968/ so that the honeypot field is randomized each time to avoid the bot recognizing it.
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