I think he deserves a bit more credit than he is getting.
My good old pal mister Mute button!
Up until about two months ago, i never used the mute button to cut out the toxic/negative players. I just sat and read all the chat while waiting to see the end game lobby to report the player.
HOWEVER! I have been attempting to mute any player that begins their toxic spew of league trash talking as soon as i see the first attempt. Depending on how bad their first offense was when i muted them, i report them after the game as well. This disables me from getting dragged into BM hell with them and keeps my game 10x more fun!
I guess this is just a friendly reminder that even if someone starts the toxicity, YOU have the choice of whether or not to respond and inflate the situation.
Stay classy, Summoners.