I am going to offer unsolicited opinion (as usual): TV’s in private bedrooms are a terrible idea, but particularly for kids. In my personal view, one TV per home is sufficient. That means that people sit down together to watch TV, or they don’t watch it.
An important part of maintaining familial connection is interaction, and that interaction is greatly muted when the kids can “hide” in their rooms, even if they are not consciously avoiding other family members.
Statistically it is my understanding that American parents spend far less time with their kids than other cultures, and surely that is one reason TV has in some important respects replaced them in implanting values and a sense of the world and their place in it. That TV, by and large, is run by propagandists, both social and political. Never forget this.
And never forget one of the values it is teaching is that parents are stupid, and that rebellion is cool.