By Claire O'Neill
Originally published on Tue December 4, 2012 2:04 pm
Ever get that odd sensation that someone's watching you? Well, if you're online, someone always kind of is.
There's that old caveat: Never say anything you wouldn't want published in The New York Times. And though we all understand the concept, we go on tweeting, Instagramming, blogging, pushing our personal data into the universe without really knowing how it might one day be used.
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