Add a field on the frontend to submit new open directories for submission to the site, with an email area for results in the format of the Reddit posts, and the user's choice of a reCaptcha (faster to tell humans apart from robots, however invades privacy) or an hCapticia (more privacy preserving, but shows the dialog more frequently which is way more annoying if it is the only one) only if you are concerned about spam or honeypots.
Add a field on the frontend to submit new open directories for submission to the site, with an email area for results in the format of the Reddit posts, and the user's choice of a reCaptcha (faster to tell humans apart from robots, however invades privacy) or an hCapticia (more privacy preserving, but shows the dialog more frequently which is way more annoying if it is the only one) only if you are concerned about spam or honeypots.