Why does that matter? I don’t care how many people are used to it or how long they’ve been doing it. In times of Mark Twain, everyone used to use the n-word casually, but that doesn’t make it acceptable. If someone is being toxic in chat wrong, and it’s also against the rules. That’s what matters.
The rules about harassment are as clear as they can be:
That’s really as clear as any rule definition can get. What more do you want, specific examples of what not to say? Because if that’s what you’re waiting for, it’s not gonna happen. Giving examples opens the rules to “rule lawyering”, i.e. toxic trolls complaining about bans along the lines of “but I didn’t say any of those things”.
Seriously, dude, defending harassment is not really a smart hill to die on.