> And before a bunch of HN smarty pantses tell me it will just latch onto a neighbor's wifi, that's not possible in my building, as we're all on the same building-wide VLAN, and you have to register a new device's MAC address in the portal to allow it in.

Extremely unlikely that LG would be doing this, but at least theoretically the TV could listen for communication from other devices and then reuse a MAC address from an authorized device when that device is not around.