My opinion is that Sims didn't go over the top or lose control against Melbourne. Melbourne had been doing that shit all game, albeit better concealed from the refs view due to being meticulously drilled by the cheatingest coach ever. He'd put in a massive effort to chase and subdue the Storm player, sending a message that we won't be bullied and had their number is part of football. Unfortunately for him, he's not as cynical as us and of course was not aware that refs deliberately treat teams differently depending on the agenda of the game.
As for Moga, I don't even see an infringement. He just fucking owned Cronk. Again, like Sims did later, sent a message that if he tries to get around him and fails, he'll pay for it. Put doubt in his mind. The refs just see a respected elite player getting manhandled and blow the whistle, despite nothing illegal happening.