The game will eventually die out from permabans and no new players due to a flawed system.
The system Riot has in place is to permanently ban so-called "toxic" individuals, and then sticking them with new players as they level up their new account. Of course some of those new players are going to feed extremely hard, and when they are stuck with Yolo McSwaggins the permabanned Diamond 3 smurf, he is going to absolutely let them have it.
Permanently banning someone for saying the words "poopoo-head" or "report" has never been a viable option in ANY game, except for League of Legends apparently. What needs to change is these people need to be stuck with a permanent chat ban instead, and in special cases such as intentional trolling and feeding there needs to be denials from playing the game for a set period of days (not lifetime).
Both of these cases will force a "cooler heads prevail" scenario as the chat banned person can't flame their team verbally, and the intentional feeder will have more time denied than he spends playing the game. I'm not sure why Riot and the people who play this game fail to realize how bad the new player experience is. Maybe they haven't experienced it in a while, but as a new player it was extremely rough. I am actually decent at the game because I had a good friend who taught me a lot before I started, but I have seen people who are bad absolutely get drilled with insults.
1.) REMOVE THE PERMANENT BAN SYSTEM. 2.) INSTITUTE A PERMANENT CHAT BAN SYSTEM. 3.) GET HUMAN REVIEW FOR INTENTIONAL FEED AND TROLL CASES. 4.) HAVE A TEAM DO 2-3 MINUTE IN GAME TUTORIALS ON EACH CHAMPION FOR BASIC KNOWLEDGE TO NEW PLAYERS. (Yes I realize there are champion spotlights, but many new players do not.)
Stop letting new players fall by the way side and be stuck with the majority of toxic offenders.