Locked: The current state of BYOND's Mods in BYOND Discussion
I like that idea as well. It reminds me of the comment system on youtube. Although, youtube also uses a post thumb up and down system, where if a post is thumbed down enough it becomes hidden in the same way as that just with a different message explaining why.
Things like this could be very effective. In fact, a reputation system built off something like that thumb up and down concept may not be too bad of an idea. Trolls playing with it could be a problem, but if it is handled correctly it would allow members of any and every kind to know who is known as 'good' or 'bad' around the forums.