I think Diabler acted like a man by admitting what he did. Some deny it until the very end, blaming it on extrasensory perception or calling the judges names. If a person admits it, then I think it would be right to understand and forgive.
It doesn't seem like there's a rule against watching an opponent's game (stream, broadcasts, etc.). I think it would be a good idea to introduce such a rule, just to be on the safe side.
