Sinistare, you say all of our characters should destroy society, yet what do you suppose should follow or will something follow in the first place? Is that the core question of the story? Sure, we will destroy the structure and kill human beings, yet as long as the species exists, society will rise up again. In what shape and form it will be is another question and I do believe that one of those "take over the world" characters Ramblingbard was talking about could come in at that moment. Or is the group's goal the true annihilation of humanity? In that case, they would have to suicide in the end, would they not?

And who will play the "good heroes"? We will need them to exist for balance's sake, after all.