Originally Posted by Voltman
So it's the backing-up fielder's fault if the ball deflects off at a 90 degree angle? I don't think so...
I agree with mundaneyogi - players aren't rewarded for good cricket in that instance.
If the fielder was accurate enough to hit dead center of the middle stump, it wouldn't deflect for any runs. If you're not good enough to hit the perfect spot to the exact millimeter, runs should definitely be scored.
On a serious note, have more than one backup man, a spread-out backup field so to speak.