I guess you could remove the wifi antenna, or otherwise brick the wifi reception ability (faraday cage, lead block, etc). Or - just boycott LG. I'll never buy any of that corporate espionage nonsense, ever.

Also: the US intelligence agencies used Echelon ages ago to monitor what vast swaths of innocent people were up to. I think it's sensible to presume they've got their hooks into these devices too.

Give it a network, but don't allow that network to access the internet.