First of all, love the plugin and hope to get some support regarding my query.
I have the _visitors group set up to not access certain contents on my site, i.e adult content, which works well. However, if you (the visitor) access the blocked content via search engine or a shortcut link to the blocked content, they are able to view it and use it as a registered user.
This is the link to my website: http://www.sweepbook.com/ and if you want to have a good test, just click on the Featured post (X Factor) and when the post open, you will see 2 shortcut links at the top of the post (Left and Right for next or previous post). The same will happen when accessing the blocked content via search engines.
Any assistance will be highly appreciated.