I think that some global understanding needs to be established or affirmed regarding asymmetrical warfare. Something useful may not be possible, but I thought it was at least worth discussion.
How does a recognized government face an enemy with no specified geographic boundary, no diplomatic capacity or public leader?
It is very easy to point to formal positions regarding 'unlawful combatants,' but I can't help but think that our current understandings are not really doing the trick.
From Wikipedia: "An unlawful combatant, illegal combatant or unprivileged combatant/belligerent is a combatant or non-combatant who directly engages in armed conflict in violation of the laws of war. An unlawful combatant may be detained or prosecuted under the domestic law of the detaining state for such action; subject of course to international treaties on justice and human rights."
I suppose it's rather grisly to recognize that there even is 'Law of War,' but this is the world we live in.
I'm lastly reminded of Voltaire who said “It is forbidden to kill; therefore all murderers are punished unless they kill in large numbers and to the sound of trumpets.”