Very interesting read (via Brandon Harris):
http://recode.net/2015/07/07/doing-something-about-the-impossible-problem-of...
"the vast majority of negative behavior ... did not originate from the persistently negative online citizens; in fact, 87 percent of online toxicity came from the neutral and positive citizens just having a bad day here or there."
"... incidences of homophobia, sexism and racism ... have fallen to a combined 2 percent of all games. Verbal abuse has dropped by more than 40 percent, and 91.6 percent of negative players change their act and never commit another offense after just one reported penalty."
I have plenty of ideas how to apply this to Wikipedia, but I am sure Dario and his team as well :) - and some opportunity for the communities to use such results.
Cheers, Denny