Well I've been getting dumpstered with chat bans recently, something that never happened when the Tribunal was up. I think it's 50% that the Tribunal is down, leading to a increase in toxic behavior due to a lack of a perceived accurate punishment system, and 50% because the automated system is dick. Anyone in the Tribunal would tell you that the behavior that I've been displaying has been reactive to other toxic players and not frequent enough to warrant action in any way, shape, or form. But obviously, the FANTASTIC automated system was truly better.
I absolutely detest chat bans because you can simply mute players. It prevents me from communicating with my team. Until a hotkey implemented chat system like the one in Smite is implemented, I cannot play ranked without being able to communicate with my team. Plus, if my team just reports me for whatever my team feels like reporting me for, I cannot defend my actions in chat. Example, I was under a chat restriction in my game as Bard, and my ADC and Jungler were flaming me non-stop for roaming, despite her feeding and laning against a Blitzcrank and Teemo, so I roamed other lanes to place shrines and collect chimes. Because I couldn't defend myself, if my team wasn't rational and couldn't see past their toxic behavior, I probably would have been reported for intentionally feeding, because I couldn't defend my actions.
TR;DL, the automated system is broken, computers suck at analyzing human actions.