Except if the programmer realises that, somehow, the people in the simulation are really sentient and intelligent.
Let's say I wake up one morning and realise that I have the power to create universes. I create one and watch what happens, and play around with it a bit. Then I realise that some of the creatures in it have developed consciousness. Do I have the right of arbitrary life and death over them ? I would think not. Now, assume that instead of waking up in my bed in this universe, I do so in the void because there is nothing in existence but me. Do I magically gain that right, now ? I am, by any definition, god at this point, but the only parameter that changed is that there is no universe prior to me. I don't think I have that right, and I don't think god, if he existed, would.
I disagree. I think we are more than justified to judge even our creator if he steps outside of what we consider to be the bounds of morality.