I am an old geek and one with both a long background in sec matters and a law degree (though I'm pleased to say I don't actually use the later). None of this should be surprising or, in most ways, particularly annoying. A great deal of 'this' falls under a rational extension of the Plain View Doctrine (e.g. if you place your pot plant in your front bay window facing the sidewalk, you can not reasonably expect a foot patrol cop to avert his eyes...or complain when there is a knock on your door). I and others have long said that what you do online is 'public' (unless you are using encryption and/or various various methods to make yourself anonymous)...unencrypted email, social networks, etc...all pass as data streams that can be 'seen' by any server they pass through. Unless you are encrypting your datastream, you simply can't reasonably expect people (governments, especially) to avert their eyes from the waves of data washing over them.
There are huge, important privacy/security issues in play...but getting wound around the axel in a dogmatic response of "OMG, the [insert favorite agency here] is aggregating openly flowing datastreams" is a waste of time and effort and decreases the signal to noise ratio as to the substantive issues in play.
Also and more broadly, read Brin's Transparent Society. Still the best foundational work on this subject area...