Just suggesting that if Person A gives positive feedback to Person B, it would show how much positive and/or negative feedback person A has.
Such as
This would allow you to judge if the feedbacks have some actual worth and if someone with lots of negative feedback would give a negative feedback to someone, you could just seePositive feedback left by Person A (+28)
and choose to ignore that feedback.Negative feedback left by Mean Person (-82)
I don't know if that would be the best solution or should you be able to see both positive and negative feedbacks as in (+28 / -5) but i'll leave that up to you.