Did you ever face this problem: You want to print a PDF, but the author restricted printing it (Document properties – Print: not allowed).

Some free PDF-Viewers like Okular don’t really obey DRM-restrictions and… you are able to print the PDF 🙂

Nice feature (OK, for Adobe it may look like a Bug) in the Linux/KDE PDF-Viewer Okular (alos available for Windows): Disable “Obey DRM restrictions”

More on free PDF Viewers: http://pdfreaders.org/