So the problem is here you'll never be able to write the rule in a way that won't apply arbitrarily at least some of the time. Looking at that rule I'm guessing

So the problem is here you'll never be able to write the rule in a way that won't apply arbitrarily at least some of the time. Looking at that rule I'm guessing they wanted to disallow sex and nudity mods in games, which is pretty reasonable. It's easy to say that Twitch should be more flexible with these things, distinguishing something like this example from a more pornographic mod, but putting more power in the hands of the individuals applying the rules will make things feel more arbitrary not less since different moderators will have different standards for when something goes too far. If you want there to be a clear rule so people know what they can or cannot do, then that means it's going to come off as overly ruthless in situations like this.