You probably understand by now but for anyone else researching this recurring subject... http://www.uorenaissance.com/info/Murder_Counts TLDR - "long" counts
It seems silly.. But you have to remember how quickly and easily someone can make a 5x or even 7x PvPer. You make it VERY easy for people to just delete and re-make a PK when their murder counts are too high or stat loss has kicked in. There has to be some kind of penalty for making a PK and getting killed(which is stat loss, but deleting the character would then negate that penalty). Heck, I remember a certain someone that was making 12 characters all 5x overnight to have 60+ counts to go around.
The issue was not people making complete characters and deleting. It was people making brand new characters. Using that char to mass town kill. Delete character. Repeat.