Having a guest network doesn't mean it is open. It can just means you have a passphrase that is different than other home devices and that you may be isolating

Having a guest network doesn't mean it is open. It can just means you have a passphrase that is different than other home devices and that you may be isolating them in a separate VLAN. I would never run an open network on my home connection, there are way too many legal risks unless you can log who is connect to it and when.