Fighting fire with fire is always an acceptable option. It's just not supposed to be your FIRST option. Mutually Assured Destruction and all. Swiss military guy I once knew had a good way of explaining this. Figure out all the worst possible things you can/are willing do to win. Then build a wall between yourself and them, but never discard them as an option. By acknowledging these ideas as an option, it emboldens you to find ways to avoid them. In vidya terms, our 'nuclear options' such as pulling a Butts upon every site, diggers releasing literally everything (even the life-ruining stuff) in one deluge, or becoming a walled garden ourselves are the equivalent of Majora's moon. Every non-aggressive idea between is another opportunity to use the ocarina to rewind time.