If people starting "attacking" my Amiga then I would care, of course. "Unfortunately", it seems nobody is interested in Amiga as a target. How many have the skills (Amiga becomes more and more unknown)? It is similar to make your house secure but nobody wants to catch something.
On the other hand I don`t know how open amiga systems are. Which ways could an attacker go and to what he has access. When I`m online and in front of my Amiga would I notice accesses?