Physically eliminating the RF capabilities of a device without impacting the rest of its functions is usually feasible with enough patience. Your options include blocking external radiation (add copper mesh/foil), or destroying the device's antennas.

I really love this kind of hacking but I hate several things.

1. That it's even necessary

2. That any non-techie would immediately be against even unscrewing anything on their own devices

Sure, I'm glad to do this on my own devices. But those willing to has gotta be a sample size of so small, its no bigger a deal than a statistical anomaly.

Modern TVs come with remotes that only work via Bluetooth, not via IR, and which are required for using the TV.

There's the missing link to make the living room mounted telescreen a reality.