I'll preface by acknowledging that my voice means basically nothing here. That said, I've seen the public record, and I 100% believe xelnia is doing the right thing. I'm a firm believer in doing what's right, even when it's unpopular.
If Robbie wants his scores accepted, he should stop expressing his intent to manipulate hardware for an unfair advantage, as inept at it as he may be. Fair competition requires a social contract, and his actions in this regard have broken that contract, and thus any trust. In other words, while outright cheating is often hard to prove, competitors must at the very least pretend to play fairly and honestly. Allowing Robbie to cross that line, as he has so brazenly and consciously done, would only make it that much harder to enforce down the road.
As far as scoreboard integrity, this is no different than failing to acknowledge later scores of a proven, unrepentant cheater, even if there is no other reason to doubt those specific scores. Again, a line has to be drawn.
Truthfully, Robbie's score is being rejected because deep down he wanted it to be. So I don't see any reason to defend him on this.
The whole situation is just sad and unfortunate.