Player threatened to report me for racist on all chat

Not one racist comment. He threatened to report me for inting (I was 1/4 at the time) and eventually went 5/4. He was toxic the entire game and then at the end in all chat he tells everyone to report me for racist. Then post game says I was racist all game. I'm not worried about Riot thinking I am in the wrong, but this kind of thing is constant. If someone gets pissed for whatever retarded reason (it was a blind game, I am unranked and he is Silver 3) they will report you. Enough of those people do just that and then I have to deal with the automated system and open up a ticket to prove my innocence. It's never happened to me before, but i see it all over the boards that a player will be punished by the automated system. League is ruined by players just like this.