"In the end, on violent overthrow, though, Ian has provided no pricipled argument against it. He thinks it would not work, and quite accurately points out that people such as Carl Drega have not drawn many people into the liberty movement through their actions. But this is just an argument as to why violence is prudentially wrong, not why it is wrong in principle. States are little more than big gangs of robbers, and it is certainly not wrong, in principle, to violently resist bands of robbers. It just might be pointless or even harmful to do so sometimes."
Violence is wrong in principle because there is ALWAYS "collateral damage". For self-defense to be permissible, it needs to address an immediate threat, on an individual level-not a collective resistance, since that would include violence done not in direct self defense(it would also be the beginnings of a new state). Sorry, either you believe in non-violence, or you don't-there is no grey area, and a BMV clerk is not fair game.