>>>I have no idea who those guys are, and have no interest to know.
You have no idea who Jerry Sandusky is? The guy who was just convicted of child molestation & brought down the Penn State football team (they are suspended for ~5 years and must pay a huge fine, as well as having all their scores for the last ten years erased). A major news story that was at the top-of-the-hour for weeks. Don't you watch TV? Or read the news? Like... ever??? Wow.
As for your claim "Communications are private, and should be private," that is not true for emails that are owned by your employer. Your emails that you post from your work account are Not private. Neither are the emails that Mann posted from his work account, which are owned by His employer: the government.