Yeah, VLANs work for a TV that is only trying to connect to your network, but doesn't deal with the case of a TV that will connect to any open SSID (a case that at least one other commenter in this thread claims is already occurring). It wouldn't be difficult to have the TV check different open networks if it's not able to reach a server due to a firewall config on the home network. For anyone living in a relatively dense city, this could be a problem.