this is another question that is too vague for me to address, at least until someone puts some more energy into it.
what scenario did you (the questioner) have in mind? why does this come up for you? some people would say that revenge is a reason to not have anarchy (it can be an escalating spiral of misery), and some have reclaimed revenge as an alegal response to injustice.
well, so there. i guess i did have a tiny bit to say... lol.