It appears that by your definition Revolutionaries are always evil as well, unless the government is obliging enough to surrender without a fight. I would strongly disagree with revolutionaries cannot be lawful, from what I've seen that's the preferred alignment for a revolutionary, or at least a successful one (Washington, Lenin, Nehru, each of whom killed way more than a dozen muggles). Whether someone follows school rules is not the defining factor in what makes them lawful.