I had cause yesterday to strip a footer out of a document that the source file was no longer available for. Acrobat had captured the footer as part of the main body text and when I deleted letters, the body text would move with it. Not great!

By chance I discovered that one could select the text and choose the colour 'none' which suited my purposes just fine. Not a great solution but hey... I think most users reading technical articles here just want to get out of a hole!