Imagine my neighbor has unsecured WiFi network set for himself, I'm pretty sure he could call police on anyone connected to his network abusing his connection just because it's not locked.

By this logic you can steal unlocked car with key in engine or unlocked bike and that's what these TV would be doing.

You would be probably excused if TV done by itself, but it would land the brand lot of negative publicity and you could try to reimburse defense lawyer expenses on them. They would probably argue you agreed with terms of service when first launching TV, so don't do that if you want dumb TV.