Translation: "P2P networks pose a threat because they can show that we're doing a crappy job of securing government systems."
Clue, guys: If your security is so lax that federal employees can ACCIDENTALLY share sensitive classified documents over public P2P networks, you have FAR worse problems than a little P2P filesharing going on, because if a Federal employee can accidentally P2P-share a classified document without running into any security measures, then anyone who's actually TRYING to steal classified data from the government must be laughing all the way to the bank.
In short, this is like leaving all your doors and windows standing wide open, then complaining that the house is drafty and there's bugs getting in.