The Spam Hurdles contains a number of useful features designed to stop spamming of your board. It consists of CAPTCHA features, to prevent automated bots from posting and/or signing up, and various other checks. It is disabled by default. It is recommended that boards that do not require registration for posting enable this.

Once you have enabled the module, go to the Settings page. Here, you can choose which checks should be enabled, ranging from CAPTCHA to features preventing multiple post submissions.