The issue is, as always, the non donkeys not calling out the donkeys.
If you see someone bullying someone else, online of offline, you intervene. Thats basic decency and everyone who doesnt do that is part of the problem.
Someone calling a person names, trolling them or otherwise being an ass should be met with a wall of reports and differing opinions.
Bullying others is only fun if you can do so uninterrupted. More compassion, folks.