I have a somewhat questionable tribunal policy.
Regardless of what their opening game was, and why they were reported, if none of their supporting games were anything wrong, I pardon.
Even if they intentionally fed 0/20.
Because one game where you raged one time and then 8 troll reports off of 3 other games isn't a fair reason to be banned. Yeah, you broke the summoners code. But you also just got banned for three games where you didn't.
Everyone rages sometimes. It's a fact of life. If everyone only broke the summoners code every 200 games, you'd only have to deal with trolls every 1 in 20 games. Across my 1400 games, I've QQ'd in chat for about 1/5th of them (I'm one of those guys, sorry), I have 17 leaves, I have never intentionally fed, said anything racist or trolled anyone (on my own team. Trolling the enemy team is fair game, dammit).
If everyone were like me, every team would have 1 guy you /ignore, and you wouldn't have a single game-losing awful troll until you had played 20 games, or potentially 200 elo. That's out of elo hell (if you believe in it, I don't.)
I have never been banned. But I promise you when I do, the first game will be one in which I left the game because **** happens, the second one will be a QQ game, and the following 3-4 will just be trollreports because I soloqueue.
Tribunal has problems. Just admit it.