Here's the scenario: "Super Spam Bot" has decided to hit your forum and make several posts perhaps even hundreds of posts. Because you have Moderation Queue enabled none of the posts are seen because they are pending approval so mission accomplished...SPAM spreading is prevented. But the cleanup is going to be kind of painful. The moderator that sees this SPAM attack now has to go through several pages of posts pending approval and unapprove them. This can take quite a while. It could be that this "Super Spam Bot" also registered multiple accounts during that time.
So a couple of questions come up in this scenario:
- Does a new user that is on the moderation queue really need to be able to post as many times as they want before any of their posts are approved?
- Should a user registration be allowed when coming from the same IP within a certain time span of the previous from that IP, say 30 minutes?