Excellent piece on CNET via @TroelsOerting on Twitter.
Samsung – On 2016 TVs, click the remote’s Home button, go to Settings (gear icon), scroll down to Support, then down to Terms & Policy. Under “Interest Based Advertisement” click “Disable Interactive Services.” Under “Viewing Information Services” unclick “I agree.” And under “Voice Recognition Services” click “Disable advanced features of the Voice Recognition services.” If you want you can also disagree with the other two, Nuance Voice Recognition and Online Remote Management.
LG – On 2015, 2015 and 2016 LCD and OLED TVs with Web OS, click the remote’s Settings button (gear icon), choose All Settings, then General. Scroll down to About This TV and then select User Agreements. There you can uncheck anything you want, but the ones labeled “Viewing Information,” “Personalized Advertising” and “Voice Information” are the ones that track you