After searching and reading through a few of the many previous posts about the subject of moderation, I chose this one to reply to! Aren't you lucky?!
Having been a moderator and admin on three large (one huge!) car forums, I would suggest a fairly short time of required moderation (10-20 posts) to try and root out any bots, etc., and then move to what I believe moderators should actually be spending their time on:
That is, let people post and only go in and look at the ones that get flagged as "abuse" or whatever, taking a reasonable reaction to what is happening. The reaction could be nothing (false report), a warning, temp ban, all the way up to permanent ban in extreme cases. This should tamp down on actual abuse, without encouraging "post whoring" like I see on many forums that have a required minimum number of posts before the user can either see or post in certain subforums.
This post, will of course, be moderated, since I am still in posting purgatory at WGT!
Thanks for reading.