This is fundamentally different from in person harassment or bullying. These things dont happen in every round, far from it, and there is nothing stopping people from muting microphones and/or leaving toxic games.
There is no line to be drawn here. Offense is taken, not given. The first line of defense should be to teach people to ignore trolls, as this is the only realistic way to get rid of them. You can't go around arresting 10 year olds for whatever you happen to consider offensive.
>next Harvey Weinstien or even Ted Bundy
That is some extreme paranoia. People online say these things fundamentally because they know that others will find them unacceptable. By crying out over something so innocuous, you encourage the behavior.
Edit: I'd also like to add, we are complaining about bad words in games that simulate killing, murder, and war. Is that consistent, or rational?