I've occasionally typed a line along the lines of "if playing this game makes you this upset, you should probably consider playing a different game. League doesn't appear to be enjoyable to you." I type this or something similar when someone starts getting very worked up in chat and flaming anyone and everyone, and just generally being super upset while playing a video game, which is supposed to bring you entertainment and enjoyment.
Would this be considered a toxic or bad suggestion to make? It doesn't seem to ever get a bad reaction, and more typically doesn't get any response from the angry person.