It's looks like you have wrong assumptions about liberal philosophy. In liberal philosophy, price of human life is set to infinity, thus price of life of any individual (even worthless ones) is equal to price of life of any group (even top of the top).

However, unlike anarchy, any harm to human life is very costly (because value of human life is infinite!), for example: killing of someone, suicide, death because of incompetence or laziness, or self damage because of self medication, etc. are «sins» for libertarians.