we have a samsung tv that is exclusively used with an apple tv and it’s seemed ok this far but i’m not sure how/if i can completely kill it trying to connect as we currently have no nearby open networks but if one pops up it’ll try and connect and i detest that
Setup an open wifi link w/ a separate router, search Amazon for travel router for devices under US$35. This may need to provide a response from an expected domain, just connect the TV and a PC to the open wifi (that isn't connected to the internet) and use Wireshark to see what domains the TV is trying to connect to. Setup the router dns to provide 400 responses to those queries, and problem solved.
Why yes, this is a ludicrous amount of technical work to expect the average consumer to do, and it is fucking disgusting that this is even a concern. I'll continue to use my 8 year old TV, I don't need 4k for something I'm watching from 8 feet away anyway.
I had to DMZ a friend's smart TV, since it was booting excessively slowly waiting for a response from the (Sony) servers, which is why I have a work around. Still, spending $35 and polluting the 2.5ghz band even more seems stupid. The TV in question had an ethernet port, but providing 400 responses on that didn't improve boot times, since it tried to find a wifi signal after that. Just stupid that a TV will be slow to turn in depending on what external servers it can contact.