Before I start off, I would like to say that I am not complaining about anything. In fact, I get irritated by people who complain about QJ policy.
I often times see people labeled as banned, and when it's someone I have never really seen as someone who would get in trouble on here I look at their past threads and try to figure out why. A lot of times I can't figure out what they did to get banned, and I think that this is a problem. I think that when someone is banned, there should be some sort of note (or have the word "Banned" link to another page) that would tell what they did to get banned, and possibly have links to the thread(s) that got them banned, and how long they will remain banned. I think this might cause a decrease in rule violations if people can see examples of what not to do and get a better understanding of what is and isn't a violation of the rules.
Also, if there is any potential for mods banning for stupid reasons, showing the mod who banned the user and the reason behind the ban might discourage mods from banning users that are innocent (or at least guilty of a honest misunderstanding of the rules). Im not accusing anyone of anything, I have nothing against any of the mods, without them this site would be a tremendous n00bfest full of fail, I simply think that having more details availible to the public surrounding bans might benefit this site greatly.