"If you have no other choices except unencrypted wireless networks, browse anonymously" I think you need to be a little clearer about this statement. In the age of Facebook "Like" buttons on every damn page, if you browse with your regular browser that has the Facebook login saved, then you're sending Facebook cookies even as you browse other sites that are nothing to do with Facebook. To really browse anonymously you need to use an alternate browser with no saved credentials. Something like Opera is good because you can completely clear your saved data at the end of each session. (And even then, Flash cookies persist...)