OK, I know that when you sign up the fine print gives them to right to study your emails. And I know that it's not a human being, but an automaton reading the email, and directing spam toward your screen. The Telcos are drifting in that direction. Ha, the NSA has plenty of company. And what happens when their (Google, Verizon, and the NSA) software gets good enough to be called intelligent?
Even if prosecutors aren't interested if you sign your right to privacy away, but this a good place to discuss the bigger picture.