Feature Request – CAPTCHA

I one of my websites that use your plugin allows for posting ads without user registration/login however when your plugin becomes more popular there will be bot posting. Already bots attempting to register users on the site.

I would like to see an option to have some sort of CAPTCHA for the submit classified form. Maybe have the option to use either reCAPTCHA or Slider CAPTCHA integration (the site currently uses Slider CAPTCHA for the registration).

Thank you for the great plugin and hope to see this feature available soon.