I carry a small, laminated card indicating my subscription to the IUSP (International Union of the Super Paranoid, tin hat division). Well, you can't be too careful. After all, we live in a dangerous world and computers are just an extension of that. After you've installed the right operating system - GNU/Linux, of course - secure browsers, rootkit and virus scanners, you might just start to feel secure - and smug. Don't be.