YYV_146
Well-known
The internet is only a small part of this. Retailers can track your purchasing habits, sure... but if you've ever had a car loan, a house mortgage or applied for a credit card, either singly or jointly with your spouse or ex-spouse, owned real property, bought an insurance policy that lists your heirs, lived in a country with birth, death, marriage, and divorce records, that data lives out there in your credit reports... co-creditors, children, spouses, addresses, phone numbers, dates of birth...
disc drive storage never forgets, and collates data at nearly the speed of light. There are a dizzying array of databases that are becoming more and more interactive. THAT is what "BIG DATA" is.
Fortunately, I don't have a car (in the U.S) or my own house because I move way too much, and still hasn't gotten married yet...
But I agree, the search sphere is not exclusive to online records. But I will say that the online bits are the most frightening ones, and while we may work hard to build up credit, our activities online are usually much less monitored by ourselves - which is ultimately more dangerous.