This is an excellent point, but none of us agreed to a contract letting us know the government would have access to this data.
If you read those TOS, you'll see explanations for when information can be disseminated to third parties (such as in criminal investigations, certain marketing purposes, etc). As it stands, Google and many of these other companies claim they were not aware that government had access to their servers, but if they did, many clauses in their TOS have been violated - unless they protected themselves in the contract through broad/vague wording.
The latter is true. Google, and others, are very well aware that their data is mined by many different organizations. Governments, really, being the least of which. Now, granted, your data is safer on Google than it is on your employer's servers (where you log into facebook and other things throughout the day) because Google has a vested interest in keeping your information safe.
There's a few giant, smoking loopholes present in the law (what little there currently is) when it comes to accessing data. It's really a place where we are terribly behind the curve and consumer/congressional education is so poor in the subject that there simply isn't a solid enough understanding of the digital world to intelligently inform policy makers.
And other questions abound. One that nobody seems to have brought up is the great halo of "probably cause" when it comes to law enforcement in the US. Under that little caveat; law enforcement would have a right to that data if they have reason to believe a crime is being committed. I think they have reason enough when it comes to DeepNet and pornography. We can at least agree on that little thought, right?
The trouble is that as an IT Professional - I don't understand or even believe people that claim outrage here. Almost everyone I know is so willy-nilly about what TOS they are signing and what website they're logging into (with same account names and passwords and emails and locations) that I can't take it seriously when people start complaining that Big Brother is watching us.
Hell, it's been legal for the government to watch us for the better part of ten years. Back then, though, everyone agreed it was in our best interests. Now that the law got pushed on through and we're starting to learn just what exactly we agreed to - everyone is upset.
Nobody, ever, reads the fine print.
I guess, to be clear, my point is that you shouldn't care because you've already been scouted so intensely that you couldn't imagine what people know about you. There's a pretty famous case of a woman getting an email from Amazon congratulating her on her new baby (before she knew she was pregnant) because the data from her purchases put her in an expectant mom's ad bracket.
The point is - you've given up all of your privacy already to so many different organizations why is it the government getting in on the fun suddenly concerns you?