Creating nonprintable PDFs
If one uses XeTeX, then then the following commands can be used to create a PDF which cannot be printed:
$ xelatex -no-pdf my_doc $ xdvipdfmx -K 120 -S -P 0x0800 my_doc.xdv
A blog exclusively devoted to digital typography
If one uses XeTeX, then then the following commands can be used to create a PDF which cannot be printed:
$ xelatex -no-pdf my_doc $ xdvipdfmx -K 120 -S -P 0x0800 my_doc.xdv