Recently an official report was released by the Pentagon about the murder of the Italian secret agent Calipari in Bagdad. The document was produced in Acrobat PDF format and most of important information was hidden as confidential.
What would You do to rerpint the part of the report in some newspaper? Sure You use Copy/Paste. And — wow! — now You can see all text without any “confidential” marks. You can read all soldier names, plases, the name of the soldier who fired, everything!
You also may try this on this PDF-file. Here is an original italian site.
Found here