There is nothing like someone accidentally putting sensitive information into a folder that is linked to your P2P share. But this is what happens again and again and again.
This time is was motorcade routes, the Presidential Family safe house and some nice documents covering details of every nuclear facility on the US.
So we have a couple of issues here, the first is simple user ignorance. It is beyond me how and why anyone would have a P2P file sharing application on any work related computer system but on top of that how can they not know that the folder the P2P apps use for sharing are pretty much open to everyone. Anything dropped in there is available on the P2P network you are using.
The next is how the supposedly tech savvy White House staff can allow something like this to happen.
You know, I see why P2P is bad, it is not because of the possibility of illegal file sharing, it is because once again, we see ignorance on the part of individual users and the companies and organizations they work for.