I take back everything I said. Upon further reflection, I have been guilty of revenge in the past; I just didn't think of it as such at the time. I had a girl (a girl with whom I was in love) dump me once, and I was hurt. It's never a good idea to humiliate a narcissist, because we exist that way in the first place out of fear of being humiliated (at least, that's what I've come to believe; never actually done any reading on the subject). Anyway, some months later she wanted to get back together. At first, I resisted, but then relented after a few months on a 'cold streak' (as she was an amazing woman; hard to turn down). We carried on for a time, three four months, maybe, then one day, she referred to herself as my girlfriend. After that, I never picked up her calls again. I have to imagine that it was one of the most hurtful things that anyone has done to her; indifference hurts, because it tells the person they aren't even worth getting angry at. Meaninglessness is the worst state of being. At the time, I didn't do it consciously out of revenge, but in retrospect I was so hurt by being cast aside that I think I wanted her to feel as shitty as I felt. It's self destructive (not that I've ever been one to act any other way than self destructive), defeatist, and it only made me less happy in the long run (because then I had to add guilt to the gamut of negative emotions).