Bukkit

What is the enhancement in mind? How should it look and feel?
On my server there are people who do not want to partake in this and just want to be able to attack each other in their town or whenever. This is troublesome because there is no way to combat this other than telling them not to (which is no fun) or constantly resetting their kills. Is there a way to make it so the kills and deaths for a certain player is NOT recorded? That way these people who kill eachother for fun do not ruin the kill and death counts.

Please provide any additional information below.

Perhaps a command that removes the persons name from the file where kill and death are recorded at. Or makes it so their name is read only and not writeable?