When I was in France recently trying to use free WiFi I was required to enter my name, address, mobile phone number, etc on several of them. I have a screenshot of one captive portal page here: https://twitter.com/#!/nelson/status/178533010302451712

"Because of January 23, 2006's law, you have to register to use our wireless service. In accordance with the anti-terrorist legislation that came into effect on 23/01/2006, we are obliged to record the identities of users. The data collected in this form will be shared with the National Commission on Data Processing and Liberties and will not be used for commercial purposes or sold to third parties without your prior consent."

I probably used 20 different WiFi nodes in France and I'd say about 4 of them tried to collect contact data like this.

More info on the law here: http://www.edri.org/edrigram/number4.1/frenchlaw