If you're feeling especially crafty, open the back of your TV and disconnect the wifi/bluetooth board. It's a discrete board in all of my TVs of different brands. I assume they build them this way so they can use the same network board design/production for years and just upgrade the main logic board in newer models.
Even if it isn't/hasn't happened, there's nothing to stop someone like Samsung sticking cellular modems in their TVs to work around you doing this.
If we think about it like Air-Tags too, popular enough product, it'll just connect to one of your neighbour's TV's which _is_ online.
I remember years ago, Vodafone gave me a "free" femtocell because signal in my home was poor. They neglected to mention the fact it broadcast a public cellular signal which allowed other Vodafone customers to use _my_ internet bandwidth.
True. Although, if they put that SIM card on the bluetooth/wifi network board that I'm disconnecting then I'll be ok.
I would be surprised if they used cellular technology for this though (from a cost perspective). I'd expect a lorawan/helium like implementation.
Amazon has a solution to this. If your tv is within wifi range of an amazon device, your TV will be able to connect to a network. It might even be your neighbors device.
e.g. the Samsung QB65R on Amazon
So yeah it's like $100-200 more expensive, but hardly seems.. unapproachable?