When the history of our era is written, it will say that World War III did not begin in a chemistry laboratory or in a hall of state, it began in the comment sections of articles and message boards.
The only answer? Strictly moderated messages. The first second anybody gets even remotely impolite, the moderator simply deletes the message. I have no idea what Chinese message boards are like, but I have to imagine something like that is what happens over there.
…but over here, until other people are willing to strictly moderate their comments, I’m not going to be the only person online leading by example.