This is a new method of blocking custom post types. There are two main differences over the method described here and the original method I described here.
First, this method is a little more scalable. If you have multiple custom post types and want to set a blocking value for each, you only need to add to the settings array. Second, this method allows you to override the blocking value on an individual custom post type post than you have set for the custom post type as a group. This operates the same as regular posts and pages.