When it comes to Printed, Scanned and Copied documents, the standard security principles related to digital documents are not being applied, and they need to be. Companies are protecting their networks, but not the devices connected to it beyond PCs. Imagine your Manager printing your new pay raise agreement on a printer shared with your team, and the Manager gets distracted on a 20-minute phone call before going to pick it up. Imagine them taking it home, leaving it on the side, and they have 20 of their closest friends around for a party.
Apply that feeling you have right now, to any document that has sensitive personal data included on the page, throughout your business.