What's with the /all ridiculous banter?

I knew that low elo players spam all chat with a bunch of pointless messages but in my last ranked game there were 3-4 players constantly typing and fighting in the game. Just turn off /all chat. It's literally useless. Stop ranting in all chat about how Ahri should kill herself or how you can totally 1v1 her. Just leave her alone and focus on the game.

stop wasting time typing