What would you think of an in-raid Karma addon, where everyone can award any other raider of the raidgroup with good or bad Karma? So you could downrate a not well performing player, or award a player who just saved the raids ass with his/her latest proposal?
An overview at the end of the raid would make sense... and rules like 'you may grant good Karma indefinetly, but bad Karma only once'.
I'm still in the brainstorming phase... did someone else the same brainstorming already? and hey... this could well be an ora plugin ;)
I'm a bit confused as to what the purpose of this would be. Are you talking about guild raids? If so, are your guild/raid leaders not able to determine who is underperforming without asking the entire guild to vote? Is your guild modeled on Survivor? Or are you talking about pug raids? If so, why not just use one of the many available and well-established addons that let you rate players? What is the purpose of letting everyone rate everyone else in the raid? Do you really care what some random stranger thinks of another random stranger?
Wouldn't it be a lot simpler just to institute a policy whereby guild members could privately share criticism of other guild members with the officers? If you've got so many players in your guild that you think you need some kind of group rating system to rate them and keep track of who's underperforming in raids, I'd say you have a bigger problem to solve than an addon will really help with. :|