Comment by Zenst

You need to add a cool off timer of say 5 minutes still even if you delete a pending post, otherwise can bet somebody will abuse this to churn up there system DOS style. There be dragons out there.

Also some visiable indication on near the user/logoff part of the page indicating if can post or awaiting approval of a pend - say a "+" indicating can add a post and a "-" indicating you can't as have pending post.