How riot can do a better job of dealing with player behavior
STEP 1. crack down harder on gameplay trolling lets face it, your troll prevention sucks ass, and the "bad game" excuse doesnt fly when a tahm kench anivia duo can throw over 500 games in a row and still only get a 14 day ban, and ONLY because they made it on the front page of reddit. odds are now theyre just going to be more subtle. GETTING CAUGHT throwing games should be an instant permaban after a single valid report, trolls arent afraid because people KNOW as long as you stay quiet in chat, and don't just flat out run down mid or build multiple boots/tears, the odds of you being banned are incredibly low, and even then it starts at a 14 day ban. and by the time you get caught again, your punishment level will have very likely decayed despite continuing to troll.
STEP 2. Improve visibility and trust Currently, visibility with the player behavior system is practically nonexistent. and several myths have developed as a result. and people don't trust the system to do it's job, which often leads to feeling hopeless, and people trying to take matters into their own hands, often by counter trolling or by flaming in chat. a single popup if you're the "last straw" doesnt do shit. and then when people report countless toxic players and get the popup one time out out of every 50 "usually for chat" it feeds into the myth that riot only cares about chat.
Step 3. bring back warnings
Currently, you actually have to be chat restricted before you even realize you're breaking the rules, combined with the fact that riot will punish for incredibly trivial things in chat. this leads to people talking normally for several games. and being shocked when they get slapped with a chat ban when they've been typing the same way for multiple games without even being warned they were breaking the rules.