I've recently been playing a massively-multiplayer game in which an informal or semi-formal honor code or code of conduct has taken root among most players. The rules not only require adherence to the game's formally-defined Terms of Service (ToS), but include player-defined and player-enforced rules to provide some protections to new and/or casual players. Players who violate this code of conduct are not banned from the server (since they did not violate the ToS), but they face in-game retaliation by players, including expulsion from player alliances and being "marked" as fair game for relentless PvP attacks. Despite the general consensus on these rules, I have not been able to find a fully-authoritative and exhaustive document defining all the rules - the rules are a social construct that is generally learned by hanging out in game chat rooms and participating in alliance activities.
Are questions about the existence of, interpretation of, or enforcement of player or community rules in-scope for this site, at least to the extent that a "good subjective" answer can be provided based on experience actually playing the game online with real people?