FWIW, I would not trust LG here to actually do nothing even after turning all the elements off, their GUI is especially "web"-like. Just leave it disconnected.
I don't understand why people can't just get a secondary device for accessing live streaming programs. There's numerous devices you can buy that do it.
TVs should not be connected to the internet. The incentive structures are just too bad against the user.
They'll probably start making them with sim card and modem at some point. I can picture it now on a future ebay listing: faraday cage for your tv - only 99.99!
Instructions given from the twitter thread but are probably slop:
Samsung:
Menu → Settings → All Settings → General & Privacy → Terms & Privacy → Turn off "Viewing Information Services"
LG:
Settings → General → System → Additional Settings → Turn off "Live Plus"
Settings → Support → Privacy & Terms → User Agreements → Turn off "Viewing Information"
Roku TVs (TCL, Hisense, Philips, Insignia, Onn, Sharp, and others):
Settings → Privacy → Smart TV Experience → Turn off "Use Info from TV Inputs"
Settings → Privacy → Advertising → Turn off "Personalize Ads"
Sony:
Settings → All Settings → Turn off "Samba Interactive TV"
Vizio:
Settings → All Settings → Admin & Privacy → Turn off "Viewing Data"
Amazon:
Settings → Preferences → Privacy Settings → Turn off "Device Usage Data", "Collect App and Over-the-Air Usage", "Interest-Based Ads"