Email isn't a secure means of communication to begin with, so...who cares? Now, when they believe they can try to install sniffers on my system to snake my decryption keys without my knowledge...I will get ticked.
Simple solution - use encryption. If you are worred about the government then you shouldn't be trusting your ISP either. Use GnuPG/PGP or S/MIME. The only probiem is that they work better if you are using an email client, not webmail.
The Facebook thing... yeah, it's literally called a wall. You tell me how secure the stuff you pin on a wall at work is. Facebook is not a place you go looking for privacy - it just isn't. The e-mail thing though, I don't think they really have the right to do that. We could have a huge legal class on that though, being that in this country you mention taxes and you scare people into hysteria so quick not be paying enough attention to know what the IRS is doing.
What's the difference does it make? Everyone can read my emails freely, including FBI, CIA, hackers, my son and my wife, now the IRS. However, no one can get any useful information from an old-poor-retired engineer.