xyth: Don't worry man. Seriusly. The risc of a hacker (read: cracker) being able to know his head from his ass in AmigaOS is near zero. It's like worrying about e-mail worms on your C64, if you get my drift.
If you don't get into someones attention span by writing the wrong things in the wrong IRC channel, then you have nothing to worry about.
(edit) This does not apply to *nix, Windoze or anything running some kind of server; such are hacked by the thousands using automated software and therefore needs proper counter meashures. (/edit)
