Change your network name. When the TV prompts you to connect, join the renamed network. Then, rename it back so everything else can connect again and the TV can't. I can think of a few potential problems with this, but, it might work?
Or blacklist the TV's MAC address in your router settings. Didn't think of that first for some reason.
Or blacklist the TV's MAC address in your router settings. Didn't think of that first for some reason.