Hi Duane,
The unclickable technique is just a cosmetic technique using javascript, it is not a security setting. Someone who navigates directly to the page (or if they have javascript disabled it won't be unclickable) will see the page. So what I usually do is enable the Child Pages Site Map on unclickable pages so that if anyone does land there all they see is a menu for the child pages.
In previous versions there was not a way to make links in the TreeView menus such as Site Map unclickable in the same way as other menus, but it is possible now, I've just updated the article Unclickable Menu Items to provide steps to to enable it on the Site Map.
Hope that helps,
Joe