To make things worse, couple of years ago, Chrome started mingling Chrome Sync and cookies for accounts.google.com which meant that signing into Chrome Sync also automatically signed you into all of Google services. The cookies reappear even if you delete them, just because you are signed into Chrome Sync. Now, that same identity (<you>@gmail.com) is not just used for Google's own websites, but also made available to anyone who uses Google Analytics - which is 90% of the web - including your cross-domain and cross-device history. Of course, none of this is new, but I shudder every time at the thought of how much information the user is giving away about themselves.