If someone is supposedly concerned about being recorded, having their privacy invaded etc. but they're too lazy to change the wifi password and deal with the trivial inconvenience of changing it on other household devices then in this case the revealed preference really is that they don't really care.

The gamers nexus thing touched on this.. Apparently some ignore that choice and connect to open wifi or something like Comcasts modem hijacking wifi.

So change the wifi password.