It surprises me that there's anyone who isn't aware of everything we do online being tracked. Companies even know whether you've opened an email they sent you or if you simply deleted it unopened. I've had emails asking why I hadn't been reading certain emails. There are tracking cookies in everything and, if you want to avoid them, get off the internet.
One thing that made me laugh in the past week is that a friend an I had discussed the possiblility of taking a trip on a Canadian train this summer. We mentioned it in emails (Yahoo) and during a Skype session. Next thing I knew, ads were popping up on the right side of my screen for Canadian train vacations!
Yes, Big Brother is well and truly watching (and listening). I hope I'm doing my bit to entertain "him".