If one uses XeTeX, 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
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If one uses XeTeX, 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