I'm not sure what section I would report this behavior under, if it's breaking any specific rules at all.
If a player follows another player [assassin] that's gathering a mob around a KS-allowed dungeon [Glast Heim Underprison] and uses Ruwatch or a like skill in order to intentionally uncover them once they use Hide and begin Grimtoothing said mob in order to MPK them with that mob and then steal it?
I know it's completely disrespectful, childish and underhanded, but is it breaking any rules in order to be reportable? And if so, what context would it fall under to be reported? Harassment, etc...?