I rooted my 2013 Samsung TV and overclocked it from 800 to 1200Mhz (the whole system is actually build for 1200Mhz but only the Highend-Ones are qualified for it). To my surprise the amount of data it send to Samsung was quite reasonable but still I removed most of it. Full removal of Internet is not an option because then I lose HbbTV and Prime TV which is like 50% of what I use that device for. And since I rooted it I also use it for BS and the public broadcasting mediatheks. Also, it now runs Quake2 in 1920x1080 in ~20fps.