When i was in iron and played tons of ranked for 6 months i feeded a lot. I did not get banned, but people was toxic as fk. i reported them, but they didnt get a single ban. Instead of that, I received a two week suspension for feeding later. Last month I got banned for toxicity, my jg fed a lot, didn't gank, but it was draft. Its ridiciolus that the report depends on the gamemode you play on.