It would be nice to have a capability to hide or unpublish specific placeholder items in live/published page version. Now we put hidden class on items, or put it in style block with hidden class to hide the item, but it is still being rendered in source code. Any other way is to just delete the item without any possibility to restore it later, or move it to some unpiblished page if you don't want to loose entered content.
Would be nice to have additional button next to Cut, Copy, Paste.. named Hide or Unpublish which when selected highlight the item in structure mode (some color to indicate that the item will not be rendered) and don't render it at all in content view.