Another thing that may connect them is seeing logins from the same IP address. Since most people have a NAT box at home, it only takes two different devices checking different email addresses from the same home network to create a link between them.
If that doesn't work, the fact that Google owns DoubleClick is definitely enough to link up multiple accounts. At some point you will log out of one account and log into the other from the same browser, with one DoubleClick cookie to tie them together.
(Can you tell I used to work for a web analytics firm?)
It's trivially easy to make the link. What's more disturbing is that Google is doing it as a matter of routine, and is also leaking the links to the world. In this case it feels less like "a deliberate choice to do evil" and more like "evil arising from oblivious incompetence."
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Date: 2011-08-27 01:33 am (UTC)If that doesn't work, the fact that Google owns DoubleClick is definitely enough to link up multiple accounts. At some point you will log out of one account and log into the other from the same browser, with one DoubleClick cookie to tie them together.
(Can you tell I used to work for a web analytics firm?)
It's trivially easy to make the link. What's more disturbing is that Google is doing it as a matter of routine, and is also leaking the links to the world. In this case it feels less like "a deliberate choice to do evil" and more like "evil arising from oblivious incompetence."