drhowarddrfine... I'm not splitting hares with you (though roasted rabbit is pretty tasty on the trail). Sufficient data IS collected that will uniquely identify the system (computer, laptop, mobile phone) and thus mark where YOU (or the user of that system) is located. Just watch the very entertaining CSI shows. :)
Odd thing is, as regards fictional technology intrusion into our lives, all too often Hollowood (sic) is right!