-"firewalls" as they are known, do not stop machines from getting your information.-

Acutually, that's not really the point of a firewall, anyway, but rather to block outside access


- I guess that's too hard a thing to do. Concidering this why not have them furnish ficticous data?-

ever tried to ping your actual ip (not the firewall mask) while behind a firewall?

Anyways, i think that you may be concerned about cookies, spyware, and the like...if so there are plenty of programs out there (freeware, even ) that can take care of a lot of that.