The argument that only people engaged in wrongdoing should worry about the government seeing your data is unfortunately becoming less and less the case. In just the last year, we have seen many examples of abuse:
1) The US government targeting people that lean some particular way politically... through the IRS and otherwise
2) Journalist that are critical of the government having many mysterious goings on with their online account (just read an article today about a government employee whistle blower having four or five years of his email account, which contained evidence of government abuse, accessed and destroyed).
3) The government obtaining dirt on people that are critical of it, or engaged in activitism they don't like (dirt as in not being illegal, but embarrassing).
It seems lately the government here has no qualms about crossing any lines.
Unfortunately this is true. What really bugs me, however, is that the NSA is so covert that the rest of the world knows about it before the US. Which means they are targeting Americans not he rest of the world. But Americans feel so safe, that no one will do anything about it until it hits them. Then they will post in Facebook that the government sucks. That's about as far reaching as Americans will get...Facebook posts.
That's why I think the government here will keep pushing to see how much it can get away with. At this point, I think anything. Heck, they can come arrest you with no trial, no explanation because of "national security".
Scary and starting to remind me of Russia... People vote against someone and he becomes the president anyway (not implying Obama, I like him, just stating that the people don't matter anymore).