You might as well broadcast. If the hub doesn't broadcast, then all your WiFi devices will blare the SSID out clear as day every time it needs to connect. IOW, instead of hiding the door (where someone can just follow someone who has to use it), just be sure there are sufficient locks on the door and pray you don't have a mole (which NO amount of security will be able to fully stop).
Biting the hand that feeds IT
