Aloha,
It's quite simple to not be chat banned, if someone would use the energy they use to rage in text (meaning they had to open the chat window and actually type what they are saying) and focus it on their own play.
And then, here is a shock, just be civil with one and another and ignore the toxicity if aimed at you. You don't get chat banned.
We are all human, we all make mistakes, this happens, but in a GAME people should be allowed to try to enjoy themselves, not be subjected to a players toxicity.
Though I would love to share with you the numbers, I don't have them, and am not sure what sharing those numbers would be something we'd care to do.
At the end of the day, we moderate and chat ban people as they violate our rules because we know we have people of all ages that play our game.
-Hapa