I play RDR:O with a group of about 50 people. RDR is pretty much staged in an entire PvP realm, you can enable defensive but you can be attacked at any time, though it is rare. So the group set up a grief channel for 'griefers/harassment'. And the distinction is always made before you send a flare up, just getting killed isn't 'griefing', and you're expected to change server before asking for clan help. Griefing is if the same player persistently follows your sessions to 'harass' you. This seems like the same shit.
After every kill in CS at one time you saw spam of fagg0t etc. WaW and MW2 were awful but par for the course. See on community servers this is what happens and they self regulate. You get to know the personnel and you grow out of it until more n00bs join the community. It's how it works. The system was fine. Like in everything you have positive and negative interactions. Also pretty much everyone has moved to private chat, or stopped using mics. I mean look at the games they've checked
CS
DOTA
LOL
..
They've always had 'toxic communities' by their standards. We were playing in them from age 13 onwards and others like Quake, UT getting told that our mums gave special mouth love and they had a fetish for ass sex. If you had a deep voice, you were a pedo. If you had a high/posh voice, you were gay. If you had a strong accent you were called stupid by way of being unintelligible.
Some people are soft and they are entering a domain where it's dog eat dog. Most of them just need to learn how to deeprate personal insults from insults just thrown around.