You only get end-to-end encryption if both ends do PGP. They offer some security perks like encrypting the mail on the server and running diskless servers if you're communicating with non-PGP people though.
If you make them have to work for each constitutional violation then they might at least consider not breaking the law.
All this cloud shit has made it far too easy for NSA, etc.
I think that it's time the tech industry had an open and frank discussion about about re-building our infrastructure from the ground up to avoid organizations with means (e.g. the NSA) from abusing the system. Privacy is essential to a healthy culture and a healthy economy. Can you imagine Putin taking advantage of similar tracking to hunt down homosexuals with his draconian anti-gay laws?
This is a pandora's box that needs to locked shut.