Insty has a good idea here for the Romney Ryan campaign.
"They’re desperate, so they’ll try anything. And — as with the bogus McCain-affair story from the New York Times, the press will do its best to hype anything, however weak. If I were Romney, I’d have lawyers quietly informing outlets that false stories before the election will be met with libel suits — and expensive, embarrassing discovery — after the election. Whether I win or lose, guys, you’ll have my lawyers trolling through your emails for years. And we both know there’s a lot of stuff there you don’t want anyone to see."