More power to those who have the resources to get the digging done for them. Even with a perfect AI interface, you could only ask "Alexa" so many questions in 24 hours. Lowly individuals would gain absolutely nothing, they have better things to do than sniffing each other's data trails. That investment of time would in the overwhelming majority only be worthwhile for malicious use cases.

Even in the simple stalker/stalker evasion scenario: the stalker would enjoy digging into the data, but for the stalkee, keeping track of the stalker for avoidance would be a terrible chore.

I thought I was just tripping when I read that line. The whole thing is eerie as fuck.