I don't think it's a good idea to turn on moderator confirmation before the message is shown. In my experience, there are many cases that: I accidentally post the article before completion. I'd like edit my article right after I've posted. Adding extra points. Even though, I reviewed my article before posting. But mistakes are not prone even after second inspection. Finally, I don't think there are many spammers on this site. I strongly recommend that you turn it off to make it user friendly. I think simplicity is the key!