It's unfortunate but there are a ton of shitbag people out there whose method of using the Internet is to be as shitty as they can be. Whether it's fascism, abuse, sexism, racism, harassment, or just being the kind of person nobody wants to be around, these are real-life humans who've always been around and volunteer moderators/admins have always had to deal with. It's as old as Usenet and if you've ever done in-person community management you know that it's just a feature of our society in general. (People are just a little more wary of being yelled at and punched in person though.)