That's true. But this isn't a cat that can't be put back in the bag. Yes, governments, especially the US govt, has a ton os surveillance data, but the efforts to improve encryption of data at the signatory companies will make it harder to collect going forward and eventually the existing data will "spoil".
The interesting question will be how the public responds when someone sets off a massive bomb at the Super Bowl and it turns out they organized the whole thing on Facebook, taking advantage of the latest encryption FB provides.
PS - I say "interesting", but in the ardent hope that we will never get the answer to that question, or a similar one, but the odds are that eventually there will be another massive bombing, eventually a large asteroid will hit the earth and eventually the Yellowstone Supercaldera will erupt again.
