We can all agree that everyone has the right to be arbitrary and capricious. Codes of conduct are a formalization of expectations and rules for behavior. The are often tied (explicitly or implicitly) to an adjudication and enforcement process much more complicated than the person in charge just saying "get the fuck out".
However when someone brings up the idea of improving that bureaucratic process by comparing and contrasting Codes of Conduct language and enforcement to our society's hard-fought experience in creating fair justice systems, you retreated right back to the right to be arbitrary and capricious.
This is why people can't help but wonder: what the fuck are we trying to accomplish here? All I know is I need to publish a specific flavor of bureaucratic boilerplate so I don't get my reputation attacked for not publicly promising to kick out people I would have kicked out anyway. And that I can use that document to dole out punishments with a larger air of legitimacy and seriousness than just telling someone not to come around my place anymore.