That's the nature of the digital world- lots of users, cloak of anonymity and limited law enforcement presence.
Trolls, bullies and criminals have established a constant presence on social media.
TSR has more effective moderation than most other websites and the bad apples tend to get banned very quickly.
Facebook, twitter, instagram, youtube, yahoo and reddit are filled with cyberbullies.
The situation on a lot of gaming sites is much worse and 4chan is an open horror show.