Stephen M. Walt worries about Butters' enthusiasm for taking out Qaddafi:
Targeted assassinations of foreign despots may seem like a cheap and efficient way of solving today's problem, but we won't enjoy living in a world where foreign adversaries think attacking U.S. leaders (including the president and his inner circle) is a perfectly legitimate way of doing business.
And notice that making targeted killings more legitimate tends to level the international playing field: you don't have to be a powerful or wealthy state to organize a few hit squads and cause lots of trouble for your enemies. So even if this attempt at "decapitation" were to succeed in the short-term, the longer-term consequences may not be quite so salutary.
The Dish 