I was asking for posting rights back in lj_nifty so that I could add an update to an old post I made there. Since that community is now moderated, posting rights are open, and I could edit my post.
So if I want to make an evil post that wouldn't be accepted in a moderated community, all I have to do is make an acceptable one first, then when it has passed the moderation process, edit it to my original evil intent.
One other minor point: I just re-joined lj_dev to post this, and got the message in http://www.livejournal.com/community/join.bml
This community allows posting by all members, so you now have access to post in it.This wording should mention moderation if it applies.