Should campaigns establish a social media policy? Yes, according to this WebNewser post.
Among the companies whose social media policies are available on the site are About.com, the BBC, Dell, Dow Jones, Gartner, Microsoft, the Smithsonian Institution, the U.S. Air Force, Wal-Mart and Yahoo!
So if your organization is fretting about social media and you want to get them into the modern age, show the top brass this site. And if your company already has a social media policy and wants to show it to the world, it can submit that policy for inclusion in the Social Media Governance database.