a gun is the original 'point and click' interface. It's not really hard. "never point a gun at anyone you don't want to kill' It's so easy even liberals should be able to figure it out. Er. Well maybe not that easy.
as far as the geneva conventions are concerned? The Bad guys don't adhere to them so why should we? So we'll be on the 'right' side of history? Yeah. DEAD right. Good guys finish last.