phonescoop.com
What about user moderation?
Just my opinion, but I believe you would create a hellstorm by implementing a ranking system, regardless of it's intent.
https://www.phonescoop.com/forums/forum.php?fm=m&ff= ... »
We do have the "report to moderator" link right below each message, and we encourage everyone to use that. With hundreds of forums and some of them too active for us to keep up with ourselves, we do rely on users to report inappropriate messages to us.
However, for the reason above, we find it necessary to have that intermediate page explaining what qualifies as "inappropriate", and we also find it necessary to make the final call ourselves to insure the moderation is fair and unbiased.