[color:"orange"]The owner becomes hostile & tries to kill you.[/color]
Obviously, then, a reputation system can not be based entirely on honesty. Different groups may value one virtue over others (even to a large extent), but I don't think you could reasonably exclude everything else.
[color:"orange"]Isn't that really what the Larians are talking about though? A world with most or all major decisions being 'least worst' or 'shades of grey' is going to have to be morally neutral, because you otherwise get punished whatever you do.[/color]
If there is no right or wrong, then there are also no moral dilemma. It is also not a dilemma if there is a choice with no down side, so there has to be punishment whatever you do. The trick is to try to determine which option gives the best results with the least damage, from a selection of fairly evenly matched choices.
The whole point of the dilemma of pushing a fat man over a bridge is whether or not you can justify the murder of an innocent person in order to save lives. If murder isn't wrong, then the dilemma is reduced to a simple math problem.
There can be morally difficult or debatable situations, but that does not require the entire moral system to be neutral.