My wife, my two daughters (2 yo and 7 yo), and I live with my parents and my grandmother.
I don't really watch TV myself, but my parents and my grandmother are used to having the TV on when having supper, even though they sometimes complain that the TV programs suck. They'll keep watching TV at least from 19:00 to 22:30. My kids are invariably mesmerized by the TV and will almost stop eating. Sometimes they take almost 2 hours to finish their meal, leaving little room for homework, studying, and rest; causing my wife a lot of stress and anger.
It's not my place to tell my parents to turn off the TV.
Is there a way to immunize or desensitivize my kids against TV? By that I mean make my kids ignore the TV even when it's turned on.