It's not surprising that Google and Facebook would be huge advocates against government and other use of their databases - I imagine the renewed fervor about end-to-end encryption and the increased skepticism of cloud services is really going to hurt their business model. A secret kept by two people is almost as private as one kept by just one. (Not saying that they'll succeed or even that they have an incentive to succeed 100% of the time, just that I imagine the lack of trust now is going to start hurting soon, if it's not already.)