What Twitcher states is true. We're all spectulating at this point, regardless of our experiences. The colour coding of posts would be a good idea. Working with vBulletin on a regular basis, I know that you could also create a seperate group of users which can post but are subject to moderation prior to going "LIVE" on the board. This will also work well if an Amateur comes up with a constructive post, it can still be added to the topic at hand whilst the trash is removed before it is even displayed.