Since the Machinist is the leader of his gang and there is no one else in his gang, banning him from the game means that his whole gang will be disbanded. This also means that his territory will become free for the taking.
The removal of the Five Gears gang means that two more districts will open up. These two districts will be vied for by the Golden Hammer gang and the neighbor of the Five Gears gang, who Cedric used to support.
Between these two gangs, Sir Kriss could already tell who would win the open and fair fight for the territories. So he can determine that the sanction and the punishment of the machinist will benefit the Golden Hammer gang.
This didn't help to diminish the anger he felt towards the Golden Hammer gang. He felt more and more that he should do something to punish them. But he also knew that it was a bad idea.
He could only sigh in frustration and rush to his study. Then he sat down to think on the matter.