To further clarify this, the example you posted would be hardly punishable by a tribunal because a tribunal would not have all the information - for its own structure, a system like that could not give every information possible to the players. The actual mechanized system can.
THIS
All of you arguing against the automated system thinking that a human perspective would be better, obviously never took part in the actual tribunal. All they gave you were the in-game chat logs. That's it, you didn't watch the game (because 1, that would take forever, and 2, they would have to record every single game of league at all times...which..no that would be ridiculous), you didn't see the pregame chat, or the post-game chat. You weren't there to ban trolls, you were there to punish toxic players beyond a reasonable doubt that they were actually toxic. And guess what, the community failed at that too. 99% of the reports went through to be punished, and it wasn't based on the fact of whether or not they were actually guilty, it was because most of the people that took part in the tribunal, weren't actually taking it seriously.
I would love for the tribunal to come back, however, with how toxic a big part of the community actually is, I don't think it ever will. A machine will always be more logical than most humans when it comes to banning fairly, and justly. Over the 1000s of reports I judged back when the tribunal was live, only a handful made it out without being punished (even when some of them should have), and hundreds that should have been dismissed as false reports, went through to be punished. That's something a machine would avoid.