Thank you for the feedback and the idea. However the icons for content items are also showing the current status of the item, which is also important and good to be seen and recognized immediately. Therefore we will not change the default behavior for now, but we will keep the idea in mind for future releases.
Dear pavel I know that the icons are showing the current status. But the icons are designed specific for the status published, scheduled and unpublished for example have different icons. If you have access to 10 pages out of 100 it might not even be of any concern to you what the status of the pages are you have no access for. The little mockup shows you how much cleared it would be for users, and none of the information would be lost since the status of the page is written next to the icon as well. But then again there might not be to many projects with many pages and restrictions for certain groups, and hiding image libraries a user has no rights for is much higher on my wish list. Markus