Let's assume I turn off all the WiFi devices in my house and only hard wire things. I can still see at least 7 WiFi networks from my neighbor's houses. Not to mention public spaces. I don't really think there is any way to avoid WiFi in most modern nations.
Agreed, though you probably spend a bit of time in your home and at work. Driving past wifi the signal strength will vary wildly and won't likely be as strong as the one you are sleeping around. It certainly won't be as powerful as cell sites.
