I don't think we, the staff, have to divulge anything or have to answer to anyone in terms of bannings, nor should we have to. If it is a a large contentious point, where people are asking questions, then sure, we'll usually fill you in, as we've done in the past. (though usually you can connect the dots to the reasons why)
But as far as a thread keeping tabs on our bannings, I'd say a resounding no. Plus, the vast majority of bannings aren't anything you couldn't find out for yourself with a quick post history search, as omae said before.
In terms of requested bannings, in hindsight there are probably better ways to handle those. A seperate usergroup perhaps, so it doesn't raise so many questions. I'm sure DeadJustice will have right ol' chuckle at all this fuss, when he returns.