So I need to say something here to the people claiming they had an "Unjust ban"/Toxicity is not as bad as griefing/Everyone here is a Snowflake.
Play a physical team sport for once in your life.
I'm serious. Get off the computer and join a softball league, or volleyball league, whatever. There's plenty of them out there. I promise you that a negative attitude/telling teammates they are bad/swearing a lot, anything like that will get you kicked out of that game and lose friends REAL fast. I'm not going to say they're havens for nice feelings. Emotions can run high in those games and some things can be said, but players will calm down real quick and apologize if they got out of hand and they want to continue playing. When you have to be around the same teammates for ALL your games (A luxury or a detriment depending on your viewpoint, I'm guessing) you learn to communicate and not piss others off.
So now comparing real life games, here's the counters to the most common arguments I'm seeing here.
1) I've never been banned before in other stuff in gaming. Only League.
And league is quite possibly the only video game right now in the world that actively emphasizes full team play and responsibility. What I mean by this is that while I acknowledge there are a lot of competitive and team oriented video games out there, most of them can be dominated by a single player being amazing, or have situations where individual actions can be separated and rated easily. This is harder in LoL (not impossible. I won't go there), and definitely mirrors physical sports better (Try telling the quarterback he didn't need his defensive line to give the team a win and he'll laugh in your face.)
2) The real flames aren't getting punished, and I'm just defending myself against them.
They are getting punished. Just because you got punished first because your flaming was more blatant and obvious doesn't mean they won't be seen and get the boot too. Yeah, people play the system. I play Rugby as my blood of choice. Standing word is if our opponents are breaking the rules, we don't yell to the sir (ref) if they didn't see it. (Nice quick way to get a penalty in physical sports) we make it obvious that they're breaking the rules. Learn how to do this. It's a skill. If you really want to engage and defend yourself, go ahead, but keep cool, stay confident and stick to facts. If that's all you do, they can't ban you. And trust me, it's easy to tell (from all the transcripts I've seen posted here) that all these examples had the player losing their cool and starting the harassment. It was already said in this thread, but it bares repeating. Saying, "You're bad!" Is harassment, not constructive criticism. Saying, "Care, you're too far forward, and that's why you've been ganked several times," doesn't matter if they say "Shut it. So Toxic." You're not going to get banned.
3) Toxicity has nothing to do with gameplay and is easily avoided.
This is the big one that I honestly can't believe people are saying. In full team sports like I've been describing, communication is key. Hell, how many of you have flamed because "Mid-no AFK!? WTF!?" Saying you can just mute a player so you don't get anything form them except limiting it to pings is incredibly oblivious to game dynamics. While pings are a useful tool, they can't be the end all, so the solution can't be to completely shut off a teammate. That will still affect the gameplay significantly. Again, the first thing I learned in practice for Rugby was the coach wanted to hear us yelling on the field. I think that was drilled into us more than almost any other piece of rules or strategy. Talk! Talk to your teammates. I can understand getting heated and emotional in the moment, but seriously, the thing that baffles me is I've never seen a game where someone in chat admitted they were hot and apologized for it. NEVER! I think if that started happening a little more people would start to believe these "Unjust bans" claims a lot easier.