I think you might have misread my post above. I don't think I implied that "emptying a node is a responsible behaviour". What I said was, when you give the user the power to edit, you're potentially giving her the power to remove the entire content of the post - not deleting the post and making the node (id) disappear but emptying its content. So the question is, why empower the person to potentially remove a post's entire content and yet not allowing her to delete it?