You hope he reported the refueler to the company. Outstanding. I hope this isn't an indication the industry (and the country even) is becoming a bunch of dobbing, back-stabbing, nanny-state tossers. It'd be a sad indictment.
If it’s any consolation, I couldn’t see any point in reporting him. We all make mistakes, and I doubt he’ll make that particular one again. In any case, there are far more important things needing the company’s attention.
One question that hasn't been asked is whether the "excess" was MTOW or MLW. If they were over landing weight, could they have not burned it on route?
That depends entirely on how much over it was.