Riot, its true. Your system is crap.
I've been very toxic I have to admit, like a lot. I've gotten maybe 15-20 warnings about my behaviour, but nothing else has happened. I kept being toxic, literally nothing but the warning messages. And those can even come up by false reports, so they truly do nothing.
I realized throughout my games I was toxic, this game is shit and it only makes my life worse. I didn't care anymore.