If you have nothing to hide why does your web surfing need to be annon? with regards to free surfing youi are limited to wifi hotspots these are monitored and if you have a device capable of wifi no doubt the network will register your unique mac address, other than stealing other peoples bandwidth that dont have the knowledge to secure the wireless network, I hasten to add this is illegal and is classed as stealing.

 sorry if this comes across harsh

Carl