It's a bit weird, though, how "easy" it is to get away with murder and lies and stuff. I mean, I know right now Cercei is busy trying to play Margaery and Tywin and more, but at Tommen's crowning, when she and Marg were off to the side, she could've quietly slit her throat and then just walked off into a side door somewhere. It makes you wonder how kings and lords ever rule. It seems like there would always be someone with nothing to live for who can be hired for an assassination attempt... poison, arrow, sword, whatever. How was anyone ever in charge for more than 5 years?