What, Exactly, is an "Untainted Juror"?
In "Finding Untainted Jurors in the Age of the Internet" The New York Times examines one of the issues raised by former Enron CEO Jeffrey Skilling in his appeal to the U.S. Supreme Court - whether someone, anyone, can get a fair trial in an age when jurors can download a torrent of information once they get back home from a long day of tedious and vexatious "trial". The article presents no solution but that is, I suspect, because there isn't one.
No one comes to jury duty untainted by life; there are no blank slates to be found among your venire. If they find something relevant online it's just going to be something that confirms what they already believed. Your job then, as always, is to uncover their worldview in voir dire and to thereafter present a narrative that accommodates both their perspective and your facts.