It's preposterous to expect people to only say positive things with the toxicity here
Now, I'm not saying that cursing someone out shouldn't be punished. If you curse someone's family or make death threats, you deserve a punish, perhaps an even harsher one that's already in place.
But if 2 people are just arguing in chat and wasting time, and you say "stop wasting time, shut up and focus on playing" you're just giving them a wakeup call, you're not actually being toxic. Is it "friendly and positive"? No. Is it a reasonable response? Yes. Is it even helpful? It could actually be. Sometimes people arguing in chat don't have bad intentions, they just get a bit tilted or something. When you tell them that, they might snap out of it and stop yelling.