It's the same on every social media platform. People really get going when there's 'justice' to dish out and it's just such a toxic/destructive environment.
People think they're 'cleaning up' but all they're doing is making the more weak people shy away while strong willed and anti-social people get more influence and power.
When people ask for help, ask for assistance, want to be seen and heard. When they want to be validated, it's hard. When people decide X needs to go? Everyone has a take.