Not really, because we have rule of law. There are plenty of illegal ways to spy on people's private activity and we cope. If there's a hillside in view of your house, somebody can hide in the bush with a telephoto lens to watch you cooking dinner. Various active radar type technologies can see through walls. There are ways to pick up sound from a distance.
Last I heard, this seeing people with Wifi was very poor resolution and filled with noise but worst of all, the system had to be trained on the specific rooms it was being used on so you couldn't apply it secretly.
Last I heard, this seeing people with Wifi was very poor resolution and filled with noise but worst of all, the system had to be trained on the specific rooms it was being used on so you couldn't apply it secretly.