Expanding upon "http://communitybuilding.stackexchange.com/questions/1021/how-do-i-deal-with-online-trolling-harassment-in-video-games"
Okay, I don't play League of Legends. However, I keep hearing about ongoing toxicity issues with the LoL player community, with large numbers of users engaging in harassment, bullying, and other hostile conduct towards other players, despite Riot Games implementing numerous mitigation techniques up to and including near-immediate suspensions or bans.
What specific reasons are there for this toxicity, and what lessons in community building can we learn fro…