We are on a slippery slope. They say that the contents of your e-mail won't be examined, but even if that's true now, it will just be a matter of time before they are. I've been saying it for years: encrypt your e-mail communication - it's free for Windows and Macintosh…or there's Hushmail.
When you post a letter you seal it from prying eyes; why is your e-mail any different?