" For example: without free will how to you come to a new idea? how do you work out a math problem you have never done before?
I think the vast majority of what re do an say are rote and lack free will; but I think it's free will that allows us to change what we do.
I think that if you really look at ideas and thought processes, you don't really come up with them. They occur and you then perceive them. They certainly aren't conscious. I think it was in a Sam Harris book or lecture where he references brain imaging studies that show that the decision is made _before_ the person is consciously aware of it. The researchers can point to when the idea/decision occurs before the subject is aware of it himself. Where is the free will here?
The subscription feature retained all emails written, sent and received by staff within organisations that use Google's Apps and made them accessible without the need for staff Google credentials."
Link to Original Source
From what I've read, the legal argument against this being an illegal search is that the entire dataset isn't searched, it is stored. They store the communications. When they want access to the data on a particular person they get a search warrant to access the stored data. I don't agree with that, but that seems to be the theory.
Here is a short video on an NSA whistleblower about the Utah datacenter and the types of things they can do with that much data.