With folks not understanding the permission structure in my company while sending links via email, I often get request for access. As an administrator, I have to then send these requests to the dashboard owner for approval.
It would be great that when a user goes to a page he/she does not have access to they DON'T get a message that the page might not exist or they don't have access to it, but instead get a request form that goes to the folks listed under 'Full Control" of the folder they are trying to access. The owners then can approve request via the web portal.