It should be a whole sub-section, not a thread so everyone can investigate each case, if needed. After 700 bans I guess we will be facing a wave of appeals soon.
If there was a link in the ban notification message with the reference why the guy was banned for, it would have been perfect but..
There is already a "system" in place for pleading your case and attempting to recover your account.
If you haven't already I would suggest taking a look at this thread:
https://bitcointalk.org/index.php?topic=5089777.0 - theymos lays it out quite plainly.
That being said, people aren't being unbanned in significant enough numbers to warrant what you're saying. Bans aren't taken lightly and they almost never get reversed.
Even this being said, you can't stop people creating angry threads but you can separate them in their own section, so they don't messed up the Meta.