Pihole on your network… And block Internet access to the TV…
Tho… a while back the wife and I bought a dirt cheap 32 inch TV from bestbuy… it will literally turn itself on to deliver an advertisement if you power it off while in an app. (Skipping the home page)
Pihole crashes it.
We bought it for watching football outside so it’s unplugged for the majority of the year… but that’s still absolutely unacceptable. Imho