Only one way to positively hide yourself, and that is with an anon, dial up account, (you know those ones you buy ******* fromshops and service stsations) using a throw away (*******) mobile phone connection, then they can only ever get back to the particular cell phone hub you are coming in on. Download speed is so slow that you would not bother for file sharing, only good if you are look for totally anon email really! and using an internet cafe is almost as safe for that.