What would happen if you configured manual network and gave it a fake DNS or sent it over to PiHole for example? Wouldnt there be plenty of ways to capture the traffic and stop it from going where it wants to go? I would think the tech savvy folks on this site would be able to figure something out if it is a big enough concern of theirs.
I have not come across a working password free residential wifi hotspot in almost a decade - because routers have had passwords by default.
I live in an apartment building downtown adjacent to other buildings. They are all around me.
I guess that would work as long as you move to a place far away from humanity. It definitely won't work if a neighbour runs a WiFi hotspot without password protection.