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Ultimately, I don't think it's feasible to code around a culture problem. We as a community need to get better at spotting/calling out toxic behavior. Lusternia's pretty decent at this in some aspects - we have selfishness as a defence, but most people don't even bother putting it up because I literally can't think of the last time I heard of anyone stealing things. I think it's up to players and administrators to promote good behavior and punish bad behavior, but the obvious problem is that admin can't be around 24/7 (and may not always be able to distinguish toxic behavior vs RP), and the ability of players to punish bad behavior is limited when the people or organizations behaving badly are overwhelmingly dominant (as in the 15v5 example given above.) This isn't going to change until toxic people are held accountable by everyone, even those who benefit mechanically from the toxicity.