Cheap pk (arrow spam) noob pk (mod pk and mob sword spam) regular pk (open area pk and most towers) troll pk (bush/sign killers and runners) are all forms of pk in my eyes and i dont consider any of them booster or boosting kills. My defenition of a booster is someone that gets kills from an alternate account or from a friend or scamming accounts that give you free stats . But it wouldnt hurt for someone to check it out once in a while.