Earlier quoted context omitted.
The gamers nexus thing touched on this.. Apparently some ignore that choice and connect to open wifi or something like Comcasts modem hijacking wifi.
they stated it technical could. not that they have evidence of that happening.
GM did show that the devices scan for open wifi networks, and users in the comments have claimed that it connects without their permission.
Gamers nexus did not make that claim about them actually connecting though.