no public wlan

I am still waiting in Zürich and wonder why the sign says public wlan and then you have to pay. I did not pay and that's why these texts appear a day later. I wish they would offer it for free on public spaces. They can track my paths on the web and create profiles and therefore it should be free (eventually I should be paid for the information I provide to them together with my flight dates and so on, with which infrastructure providers can make money) I am just tired and want to surf through the Internet without paying :|

Besides that, my storage battery runs out of energy and they seem to have different power outlets here :(