I think Te types, some IxTJs, have a sense of the rules being the rules, especially ISTJs...and what is fair is to follow the rules, and even if you fall into personal favor, or have extenuating circumstances...there are still rules.
I think a lot of times with IxTJs they feel that rules aren't fair to their individual set of values, and really can't accept it, where as an Fi dom/aux type might (even though they might "get in trouble" a little more often, such as myself) be more realistic about not being able to always have one's way. That's not mature Fi. Sure you may morally or personally disagree, but even if you bend the rules yourself, you accept in the end that you did break the social rules. That's how it goes with me; even though I know I have my personal Fi reasons, I also accept the reality that I'm not the forum dictator, and that if I choose to continue playing with this social group, I try to understand their social rules. That's just how it is.
IxTJs for whatever reason sometimes won't accept this, and they're especially loud about it, and I don't know if it's because of their own secret need to be authority figures themselves. I know that one particular INTJ on this site is used to being a sort of authority figure in various legal capacities, and he still complains about the moderation here. JTG told me on more than one occasion about his personal fantasies of being a cop, or about creating order in the middle of social chaos, like cracking the fuck down, and he's the epitome of "train your fucking dog and get your goddamn kid off of my tennis court."
So maybe it's because you dudes want to be in control yourselves that it bugs you oh-so-much. While the mods on the other hand are living out their authoritarian needs already by being mods, even when their Fi may not fully agree with the forum's Fe.
To me it always seemed like Invisible Jim wanted to be in control, and this was verified by his brief and hilarious stint as a mod (who was banned) on Personality Nation.
You guys wanna be in control, that's my theory.