For large public* groups. The large private groups are basically 1990s Yahoo! chat rooms, complete with racism, bullying, criminal activity and child grooming. They only get caught when they get infiltrated, or when members self-report.

https://www.wsj.com/articles/discord-where-teens-rule-and-pa...

https://www.forbes.com/sites/thomasbrewster/2019/01/29/disco...