You are a member of the community. Applies to yourself just as much as others. If anything I'd say it applies even *more* to yourself than anyone else's when it comes to discussing/appealing/complaining which is *not* welcome in any forum. Most forums have these similar rules anyway.
Obviously I have no experience relating to moderation on this particular website, but on most forums it's the same, all discussion regarding moderation (including this exact one) is preferably avoided and discussed into PMs. It's just better and healthier in the long run otherwise it always leads up to bad/derogatory comments, and while it might seem a bit nazi to prohibit all discussion related to moderation, there's no real way to draw a clear line between what's harmless and what isn't.