A theory on toxicity.
Obviously there's psychology behind raging that comes from kind of knowing that your lane is going to be much harder to deal with if you die first, especially if your jungler fail ganks and you both die. And also from the inevitable pings and flame you'll receive from teammates.
I was also wondering your(and when I say your, I mean the community) thoughts on when you die your death screen goes grey. Does a grey screen compel someone to rage more? or be toxic. Seems to be a domino effect and the first piece to get knocked down is the grey screen, followed by all that I mentioned above.