Riot, it was banter!
So we just played a 5 man game against another 5 man, which had one played we all knew in real life: King Man Ultra. We engaged in some "friendly" banter (was kinda over the top tbh) and some of us might have said offensive words. We jokingly reported him after the game so he gets a chat restriction, because we are friends like that lol. What surprised us after the game was that he actually got permabanned on his account. Now this wasn't the 10th time he had been suspended, it was actually the first time since season 4 where he got suspended for leaving too many games.
We feel really bad right now because he had played a ton of games on that account, and really does not deserve the ban since it was just friends talking shit to each other, which happens in all games. You can contact every single member of both teams to make sure that we knew him, which you guys probably have all the usernames in the game logs. Here's the link: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2419734871/28398878?tab=overview
Thank you for your help