Altering display mode for authoring information
As you prefer css, checkout the module Field Formatter CSS Class


  The Field formatter CSS class module allows you to set any
  text/list/option/taxonomy field to render as CSS class on the node.
  This enables the node author to select predefined CSS styling per
  node.


Also Field Formatter Class


  This module allows site administrators to add classes to the outer
  HTML wrapper for any field display.


Then you can hide your info with css based on this unique class provided by either of these two modules