I am not sure what you are replying to, so I assume there is some miscommunication.

I don't know anything about mapping public Wifi access, like in shopping centres.

What I meant is that already some people feel like their city and a 30km radius around it is "their area" and they want to control what and how things get mapped there. It can lead to heated and emotional discussions, we are people after all :) If a big company with lots of human resources would do this, there is hardly any fighting back.