So your idiot brother doesn't connect your spy TV to the WiFi when he comes to visit, instead of using the goddamn Chromecast that is already plugged into it. >:(
They want to be "helpful" and show me they can "work tech" by doing stuff like this. They don't understand that the TV is manipulating them. I don't want to have to explain to them that I'm basically a neurosurgeon and they just tried to impress me by drilling a hole in somebody's head. Because the TV told them to.
Disconnecting the wifi avoids the need for unpleasant conversations.