This isn't public info in some cases though. Airline sky clubs charge a fee and one of the benefits is their wifi (note that on the map, these aren't just airpo

This isn't public info in some cases though. Airline sky clubs charge a fee and one of the benefits is their wifi (note that on the map, these aren't just airports, but airline sky clubs). That's like you coming to my house, I give you the password to the wifi, and then you go tell all the neighbors about it so they can get "free wifi".