Let's play a game........it's called can players be toxic without saying a word.....
Player A....an ADC. Died 5 times in lane phase because he was super aggro even after first 2 deaths. Mid game......player A help jng clear clear red because enemy is all up in our jng. Jng and player A kill enemy team jng and do srs damage to enemy team supp at OUR red. Support runs away. Player A and jng CHASE enemy support past drag to enemy team blue past blue to wolves and die to assisting enemy mid and ADC. BUT there was a fat stack of minions worth at least two kills gathering in bot lane right next to red. It doesn't infuriate anyone else that player A didnt just walk down to lane and farm two kills worth of minions instead of chasing a support and dying ON TOP of not getting the CS? If that isn't toxic play I don't know what is.