Visual Verification Options
With SMF 1.1, a new feature was added to help stop spambots from registering on SMF forums. This feature was called Visual Verification. It presents an image with letters in it in an attempt to prevent automated registrations, a way to ensure the registration is being done by a human.
While this was great at its intended purpose, it was not added to other items that could be abused by automated processes. Specifically, forums that allow guest posting were open to automated spam posts.
Visual Verification Options is a mod for SMF 1.1.2 and higher to add the option of requiring the use of the visual verification image for this type of activity. Currently, it allows forum administrators to require the image for both posting and searching by guests.
Please download from the Visual Verification Options mod page on the SMF mod site.
View the Code Repository on BitBucket