You know the feedback system on eBay?
Where you can leave a scathing comment if the guy in Timbuktu who just sold you that life-size cut-out of Billy Dee
Williams turns out to be a scam artist, and just sends you a 1/2 scale Billy Dee Williams instead? Well, a WoW player
has apparently taken it upon himself to create just
such a system as a UI add-on, so you can leave nasty feedback for that Human Warrior who bailed out on your group
in the middle of Molten Core.
The system is still in development, but I see a huge margin for abuse & error with a system like this, especially if anyone using the add-on can see comments left by others. There's not much to stop someone from doctoring up a bad rep for people they don't like for one reason or another. Then again, it is just an add-on...it's not like it will be mandatory.