I have no doubt that Google knows who is using multiple accounts/devices and they'll stuff your dossier with data from all sources. If you're wearing a device

I have no doubt that Google knows who is using multiple accounts/devices and they'll stuff your dossier with data from all sources. If you're wearing a device that knows when you're asleep, awake, fucking, or sick and you're sending that data to a third party whose entire business is built on collecting your personal data and you've been viewing that data yourself on a cell phone running their OS you can't care very much about your privacy to start with. Being forced to sign into a google account at that point is a formality.