As an owner of a (2020?) LG WebOS TV, to what degree can I fight this? Any point in trying Pihole with targeted blocking of certain IPs?
You can (hopefully) root your TV: https://e.nya.je/getroot/ and then follow a guide like this to disable all the snooping: https://forum.level1techs.com/t/lg-tv-block-mini-how-to/2551...
Disclaimer: I haven't tried any of this myself, I've just been looking into it as I am/was considering buying an LG TV.
At this point, best to just keep it disconnected. Just use an apple tv or similar. They sold us a spying device masqueraded as a smart TV.
If internet is really required, I'd personally flood such an LG tv with fake data - add a raspberry pi to provide it with looped audio streams for the microphone, fake bluetooth devices, and so on. But it's still probably a drop in a bucket.
PiHole doesn't block IPs. It blocks DNS. The device have at least three ways to bypass PiHole: use external DNS directly, or pin the phone-home servers' IP addresses, or use some other protocols to carry IP resolution.
I'd just open the TV and yank or desolder the mic out. Or use the TV as a dumb monitor -- don't connect it to WiFi or Ethernet. And use an external Kodi/AppleTV/whatever-rocks-your-viewing-boat
I bought Apple TV many years ago and haven’t plugged tv into internet since.
So I have a tv of LG from the same period. I keep it dumb, not connected to the internet and just use an apple TV, so far it's a clean option. And it's always a good idea to have piHole up to, they usually have the block list updated with LG's and Samsungs urls.