Minir point but... > IMHO, the only reasonable interpretation of these bits is that they > are a request from the document's author to not do certain things. > That is all the message should say. PDF files can be created by an operator who creates these as archive files and set these bits by company policy... So it may be precise to use a word "PDF file creator" or something similar over "document author". They may be same person but you never know.