> If a company had the IP of this couple they could link their online activity (most of which is their own) with their name, that's sufficient to spy on them.

> If a company had the IP of this couple they could link their online activity (most of which is their own) with their name, that's sufficient to spy on them. If "most" of their online activity is their own, then some of it coming from "their" IP address isn't. You can pretend to be able to identify a person behind an IP address, but that doesn't make it true.