Would be an interesting stat to see, how many different people a player kills and is killed by along with the count. Some chars kill the same people over and over, unavoidable in cabal wars. But I think its a good thing when players go after a wider variety of foes. It gives a hint about the player's style.

They just need to write a function to parse the pkill list from the PBF for unique names.

I think I proposed this at some point. The problem is that in order to determine uniqueness you need to record everyone anybody's killed (or been killed by).

As far as I know there is no lack of hard drive space in the world. Especially since the stat being discussed, at the bare minimum, would require 12 characters for each PK in a player file.

Staff tends to not like adding more data to the PFILE data structure, which is where I think it would need to live. They also store some stuff in a standard relational database, but I doubt it's practical to record PK stats that way.

Of course I've never actually seen the code, so I could be completely mistaken.