I saw another role idea for older members called Veterans, and so I had an idea for people who are banned. Instead of being banned right away, you can have a trial for yourself if you feel that it is unfair. However, you could be "executed" right away if you did something bad enough (maybe have an !execute command). People who are banned, instead of actually being banned are listed as War Criminals, only getting access to a single channel called "Prison" or "The Brig" and the Rules channel.
P.S. I would NOT want this as a reward if it is accepted XD