On the morality of the death penalty:
I live in a country (Australia) where the death penalty has long been abolished and is unpopular; particularly mandatory death penalties, say, for example, for people trafficking in illegal drugs over certain quantities. I bring up this example because an Australian citizen was executed in Singapore for exactly that activity.
Certainly, I find such laws difficult to justify as consistent, on utilitarian grounds at least. If a person caught in an airport with 0.5 kg of heroin strapped to his body ought to die because that is less-bad than the reasonably presumed consequences to many people would be, were he allowed to live, then surely there is a case for the death penalty for tobacconists or sellers of alcohol. I have no statistics at hand, but I am guessing that the tobacco sold by one tobacconist over several decades would lead to comparable illnesses or numbers of deaths as would the total amount of heroin carried by this particular Australian 'drug mule'.