Blizzard President J. Allen Brack sits down to give a roadmap update on all things Blizzard in 2020 Fireside Chat. Of note is his mention of how Blizzard has leveraged machine learning to reduce toxic behavior in Overwatch and Heroes of the Storm. The system allows them to issue appropriate penalties quicker, and they've seen an incredible decrease not only in toxic text chat but an overall decrease in re-offence rates in Overwatch and Heroes of the Storm.