In fact some versions of Kazaa use to "share" documents out of shared folder. I reproduced an experiment, creating a odd file name outsilde shared folder and bingo! : after a week or two the file started to appear on Kazaa search.
I run p2p software on a pc that has nothing else but p2p software. Not even MS-OFFICE. And i use there NIS and Mcafee.
But if a military can install p2p into a "security" military network and share files... man... they need to put some guys on AO to learn security basics