Riot has a perfect matchmaking system
The Ashe and the Alistar on my team call the enemy team a "%%%%%%."
The best part about it is THEY WERE ON MY TEAM AND IT WAS A RANKED GAME.
I don't think I screencapped what Alistar said but I remember what he said. He told them this (Paraphrased): "Go back to africa, you %%%%%%s."
This is why I put a 1 on the question (paraphrased) "How willing are you to suggest League of Legends to a friend or colleague."
[EDITED: ULANOPO - PLEASE DON'T NAME & SHAME]