"They don't about YOU they know about a person that google will refer to you as a GUID.
Subtle but very significant difference."
Ahhh bless you and your naivety. so GUID: 54645435346474232343 is located at gps coordinates 51.3417 -2.5800 between the hours of 11pm to 7am every night is probably lives there..... and when the email address on that same handset is registers to Facebook account Mr F Giles and has lots of pictures of tractors, you can guess he is a farmer... so, you have a name, address, phone number, date of birth, occupation, likes, dislikes, possible political views.....
its easy to link a name to a GUID...
There is a lot of info around on how its impossible to completely anonymise data
Biting the hand that feeds IT
