Of smart TVs, I often hear the argument that if its never connected to the internet, you can maintain privacy. Except there is growing evidence about how the data is stored while the device is offline, that it will search for nearby WiFi networks, and connect to open networks if able.
Now LG TVs have been caught logging audio recordings even when the TVs appear to be off or in standby mode. Smart TVs are a poblem as long as they are plugged in.