Ah yes racist chat spam. It has definitely been getting worse the past 10-15 years or so, with a dramatic uptick post 2008. I wonder what could have happened that year?
It's already known publicly that shitbags such as Steve Bannon have been trying (and often succeeding) to harvest these trolls from Gamergate, it doesn't surprise me that they are being recruited by various racist groups.
Kinda sad it's spread to 'kids' games like Minecraft though, but why not target the young, I guess?