An "expectation of privacy" is a general guideline for the courts when establishing whether or not a warrant is required. Fundamentally, I can understand this law as the Supreme Court has generally ruled that "expectation of privacy" extends to a home, business, person and vehicle, safe deposit box, etc. However, email and cloud storage in itself is not secure and should not have the same "expectation of privacy" as other things. I would compare it to the Supreme Court's ruling on garbage, once it is out of the house, it is fair game. I am not saying the legislation is right or fair, but there is precedence.