Agreed with thallen. When you look at past instances of the community exploiting poorly delivered content, (beg for mercy, CTF, etc;), it makes sense to think that the PK streak would be abused for whatever reason. It's not fun at all to grind for a hard streak, but it also ruins PKing. It's already flooded with people suiciding so others dont get points, so imagine if even more people start fleeing at 1hp for 10 minutes. Would ruin PKing.
IMO we should get like 3 more rooms in battle arena, but instead of regular spar they become "PK spar" (bushes, grass, mounts, bombs etc; allowed) and you'd be able to streak in this spar room. And wins/losses can go to a seperate stat called "PK spar W/L" (like eras system). There's probably a better name then PK spar but ya