But if you're using a device that's always 4+ hours drive away, I think it's fair game for Netflix to look at that with suspicion.
Also, Netflix could look at viewing habits from different devices. If you watch something from a device at home, and then watch the next episode of that show at work, that's a good indicator that you're the same person using two different devices.
First, they should already know who has been sharing accounts. You haven't been having other households VPN to your local network for the past 5 years for Netflix. That gives them a great starting point.
They can look at SSIDs and not just your SSID, but all the SSIDs that your device is seeing. Even within a household, not all the SSIDs will be the same from room to room. For most people, there will be some overlap. Sure, maybe you live in a rural area and you're the only SSID around. For most people, it'll be hard to fake this.
Even if you make all the SSIDs look similar, have you dealt with your BSSIDs? BSSIDs can be used to geolocate most people pretty well. Almost no one has opted out of the big WiFi geolocation databases (or even knows they can).
Maybe you could have them VPN into your local network, but they could still use WiFi and other information to see that the connection is actually in a different location. Plus, as I noted, they should already know who has been connecting from multiple locations for years.
Maybe we all should change our SSIDs to "FBI Surveillance Van#1".
But if that’s really the case you can just use the same SSID on both places, and maybe use the same IP address space and router MAC. If they’re fingerprinting the home network that should do pretty good?
I guess I should have just kept it at 1 device and not tried to pay for my friend's usage.