You can also download military top secret information.

That's Not A New Hit Song You Just Downloaded -- It's Japan's Nuclear Secrets
You can also download military top secret information.
'Top secret' Maritime Self-Defense Force data leaked online

And Chief Cabinet Secretary Abe asks public:
Chief Cabinet Secretary Abe asks public not to use Winny software

It seems to me that someone needs to think about their data security model, and put in place appropriate levels of access for the differing levels of classification instead of asking public not to use Winny software.