I feel VA'S for Revenge.. Should not be required, if the revenge is just. Say a mad king killed your family, and staked them on a pole, would you not be doing the world a favor by slicing his head off?
See, the problem with that is that people will take it to extremes. Someone stole your cookie? EVISCERATE THEM! It -is- revenge, after all. ^^ We can't trust everyone to use common sense in those situations, and VAs aren't -that- hard if you're even a halfway-competent RPer.
