What I miss is the shortcode to initiate this plugin on any custom registration or password change page when user is not logged in. I had to remove it today because it recognizes the registration page and change password page - plus the custom login page of a WOO Commerce shop - yet there is no option to implement. It would be great to either select the page in the SI CAPTCHA Admin panel or simply have a shortcode to add it to the forms.
Worth while to think about this, Mike - otherwise we do not have any spam problems where your plugin is installed, as I read here from many users. And we got many Google page 1 rankings, which makes all the sites to targets.