The link has a ton of information.
Now, It is obvious that putting it completely offline is more safe. But, some people often use the TV’s to watch Netflix or something like that. Then they might forget that it is still connected to the internet when they are done watching.
Under Privacy Settings, there are options for Device Usage Data, Collect App and Over-the-Air Usage, and Interest-Based Ads. All are enabled by default, but you can disable them.
There are several dumb tvs, such as the Samsung BEFX-H series and the LG UN640S. Yes, they are more expensive, because they don’t make money with ads and paid services.
These are exactly the kind I was looking at and couldn’t find anywhere to buy as a private consumer, apart from some suspicious eBay listings.
Amazon is showing BEFX-H series for me and not even that expensive, but with it being Samsung you’re stuck on LCD which can be a downside for many