Big data is as good as you let it be.
"Google catches us in an invisible web of our personal data without telling us and without asking us for our consent."
Yeah, if you're an idiot and uses your real name or same email account everywhere, and feed Google's data engine with your email and voluntary information to google+, then Google might be able to do that.
Oh wait, these are the same EU regulators who want to make it illegal to use aliases and false accounts on the net, because t̶h̶a̶t̶ ̶m̶a̶k̶e̶s̶ ̶i̶t̶ ̶h̶a̶r̶d̶ ̶f̶o̶r̶ ̶t̶h̶e̶ ̶s̶t̶a̶t̶e̶ ̶t̶o̶ ̶m̶o̶n̶i̶t̶o̶r̶ ̶w̶h̶a̶t̶ ̶y̶o̶u̶'̶r̶e̶ ̶d̶o̶i̶n̶g̶ ̶o̶n̶-̶l̶i̶n̶e̶,̶ ̶C̶i̶t̶i̶z̶e̶n̶ think of the children.