A WPA2 WiFi access point can be configured with a hidden SSID instead of a public one to make it harder to hijack.
Don’t we all have our SSIDs set to “Free Republic” or “Pig in a Pantsuit” or such?
That's what I've always done. If you don't advertise it, most people can't find your network unless you tell them the ID. When guests ask to use my network, I give them a guest SSID and password. If they want to easily get on a network, some neighbors networks are not secured (which I would never use).