> It's possible to do sensor fusion of all the outward facing cameras from your home

Is that legal though? I'm guessing it the US it might be, given the amount of cameras of public places you can see in various communities, but wonder how common that is. Where I live (Spain) it's not legal to just stick a camera on your house and record public places, you need to put the camera in a way so you're only filming your private property or similar.

The US gives you no expectation of privacy in public places and private property is generally do what you want. It gets murkier if your cameras are pointed at other private property (your neighbors).

Not a legal expert just what I’ve heard.