User blog comment:Ducksoup/Why We Don't Unblock You/@comment-11515627-20150924010131/@comment-5558012-20150924020139

Yes there are some bad Admins, those that people think are bad who really aren't, and those everyone loves. The problem with some kind of block review is that such a committee most likely wouldn't be able to see the entire picture. Some Admins leave very general block reasons (and can block for no reason), disputes happen on chat which most likely isn't logged (and those logs aren't always reliable), other wikis, and even off Wikia in some cases. If the dispute happened over an extended period, it would take a large amount of time to sift through contributions. Deleted threads are less likely to be found.

Overall, it's much easier to default to the local community as they know more about what's happening there. The community has power over an Admin as ideally the Admin works for the community, not the other way around. Most problems occur when there's either a lack of community and/or the community doesn't know their influence over Admins and/or don't care. Others occur with wikis with no written policy and/or one not created by the community.