There are many questions and concerns with the Tribunal and so I'm trying to think of a way to test the community(not Riot, the other community members that also participate in the Tribunal.
Step 1: Be level 30 and use the Tribunal.
Step 2: Start reading through and judging cases.
Step 3: DO NOT PUNISH anyone. Instead, skip their case if you believe they should be punished. But remember to skip, don't actually punish.
Step 4: When you believe someone is Pardonable, Pardon them.
Step 5: Keep track of the amount of cases you Pardoned.
Step 6: Compare that Number to the e-mail you later get in your inbox, detailing how many cases that you and the community agreed upon.
The reason for this, and the reason to skip, instead of punish, is that they don't detail what cases you voted on and which were punished, pardoned, or correct. And doing it this way allows you to track it completely for yourself.