This sort of mod can lead to other problems too - unless you have some sort of time limit or control, one disgruntled user can destroy the reputations of multiple people in minutes, I have seen this on several other forums. Likewise, all it needs is a dummy account to boost your own rep up when it is less than shiny. Cliques end up voting for each other and against those who disagree with them.
For my 2cp, and no offence to the original poster, this would be a unneccessary mod and drain on resources, that can lead to tensions and problems. Are we really so insecure that we need the virtual ego boost this would give?

Anyway, I got enough negative karma waiting to bite me in the a** in my next life without another way to screw up

SP