Earlier quoted context omitted.
That's just the reality of any platform that doesn't gatekeep who gets to participate. Eventually assholes are going to join, that's simply unavoidable.
GitHub doesn't provide nearly enough tools for moderation though. Like restricting issue creation, comments, and discussions to only certain folks (beyond the per-issue controls).
Which in itself would summon the vitriol of the super-trolls. "Moderation is censorship" is the most absolutely ridiculous mantra to gain traction in the last decade.