I created a group for those who've ever had the embarrassment of having a forum topic locked on them. If was because you were being a general a** don't apply, but if it was because of an oversight or unintentional screw up.
I moderate a couple of private boards myself and been asked to moderate a game site recently myself. That job is a pain, so no joining to complain about how badly you were treated either.
Do not join just to try to open up any topics that got a forum thread closed either. You can name and link to it if it still exists. You can describe what you did wrong but that's it.
Same for this thread in fact. This is intended to be a sort-of FAQ on how NOT to behave in the forums.