Hi, I'm giving a first view at the forum. It's really nice, thanks for sharing it!
I've a question: I see in the admin control panel a Flag view, but it's empty and I can't add any flag. What's the purpose of that part?
There is a flag link below each comment, whenever an user consider the comment to be inappropriate somehow, she can hit it and said comment will appear under that section. Admins can review the flagged comment to take further actions (ie: delete it).