Little-known data-collection system could troll news, blogs, even e-mails. Will it go too far?
"We don't realize that, as we live our lives and make little choices, like buying groceries, buying on Amazon, Googling, we're leaving traces everywhere," says Lee Tien, a staff attorney with the Electronic Frontier Foundation. "We have an attitude that no one will connect all those dots. But these programs are about connecting those dots - analyzing and aggregating them - in a way that we haven't thought about. It's one of the underlying fundamental issues we have yet to come to grips with."