I recently got temporarily-chat-banned (and lost all Honor ranking) in League because the players on my team were sabotaging the game purposely and I swore at them. I didn't use any hate speech or slurs whatsoever, but apparently just swearing at people is enough to warrant such penalty, without even a warning first. Coincidentally I had actually just hit the highest possible tier of "Honor" in the game just days earlier, obviously indicating my swearing at people is not a normal thing. I haven't played since.

Oh, even more frustrating about this is, the game has a swearing filter enabled by default. If those players saw swear words from me, they quite literally specifically opted into that by turning off the swearing filter! Meanwhile they were allowed to sabotage the game for me and ruin my night AND get me chat-banned.