Not a fan of Hate Darkness the Resser master?
A lot has been said (though not necessarily in this thread) about the Geek Social Fallacy and other similar problems for bad behavior in gaming. One thing I like to discuss in these situations is the effect of society and the media on what is considered "acceptable" behavior and how that messes with subcultures. I remember reading a few years back about how Dave Chappelle's biggest regret on his own comedy and TV show was how he pushed racial slurs and racial language into the mainstream of American society, to the point that caucasian fans of his were quoting said slurs to him from his own comedy bits. The rush of "edgy" comedy in the mid-2000s played a big role in this that's not really commented on, and why otherwise well-meaning people might say horrible, insensitive things without realizing it.* The main front, as I see it, is dealing with the people that will shape up if called out on bad behavior, or learn bad behaviors like this from others and parrot it.
*This is not meant to excuse the behavior, but understand why it exists. This also does not apply to the really egregious bad behaviors like sexual assault/harassment that's been dragged into the light from conventions and led to things like Cosplay Is Not Consent and harassment guidelines. That's just people being douchebags.