You'll have to do more than shout. Here are some suggestions to battle the TV industry. Distinguish between what you need and what some advertiser is trying to make you want. Old TVs will work just fine for a few more years. It may be the best TV is none at all.
Considerable evidence suggests that's true for kids under age eight.
Plan your TV watching like you would your theater attendance. Ration kids' viewing. It's nice outdoors these days. Check it out. The how and why of the lies and manipulation.