Improve notification when moving a Hierarchy including Restricted pages to a new Space

Pages with restrictions need to be left behind so they don't get moved to a space where they are no longer valid. But it would be nice if there was some sort of notification to the System Administrator when they move a hierarchy that would result in pages being left behind.

EDITED

1. Create a child page, pageA, within spaceA and set it up so only userA can view/edit it.
2. Log in as spaceAadmin and move an entire tree of pages, that would normally include pageA, to spaceB

The above results in pageA being left hidden, only viewable/editable by userA, in spaceA.

Now, if spaceAadmin looks at the Restricted Pages tab on spaceA, he will see pageA exists with restrictions but there is no way to tell that this page was actually left behind. It would be nice if I this case of restricted pages being left behind, there should atleast be a red flag of some sort posted to the mover if he is a Space Admin.