You might as well ask why VR constructs couldn't become administrators and do things in the world beyond the VR. In this case, being a "god" is entirely relative.
Translation: A god that can do what any being could is not a god. It's just a very powerful (and presumably also very smart) being.
Yes, this line of discussion holds the same questions I asked myself when writing my last post. I didn't realise how good an analogy Ad Homonym's "virtual world" was.
The moderator has powers which only appear to be supernatural within the virtual dimension; in the physical dimension we can see he is typing commands which are then executed by part of the server code. So does the fact the other players, or "virtual inhabitants" if you will, can never acquire the same powers classify the moderator as a God? I think it does but this also proves the notion that Gods and the supernatural are dependent on a limited scope. If you gave everyone moderator privileges there'd be nothing special about them, those powers would become part of the game and there would be no moderator. Just like Godly powers would become part of our technology and there would be no God.
So is anything more powerful than us our God? The sun, the earth, black holes, entropy, the laws of physics: these are all our Gods. There is nothing supernatural about them and we can harness the power of most of them, so how are they Gods? Are they Gods until we can explain them, or harness their power? Or are the only true Gods atop those peaks we can never scale?
An alien race may appear to us as Gods, they may be capable of things we never will achieve but does it make them Gods? Yes, because God is a relative term and is not something that truly exists. Wow this is hurting my head now so I'll stop before I go round in circles any more!