Of course, on each point. An execution needs a executioner. Where does one find such a person? How does that person integrate into society after committing a state-sanctioned murder? How does one turn on the ability to kill, and then turn it off? The person who kills is irrevocably altered. And if they're not, then they are dangerous, because they lack empathy.

Of course of the issue of error hasn't been addressed. And the inequities with which the death penalty is adjudicated. Do the rich and poor have an equal chance of being sentence to death? How about race? Do people of all races stand the same chance of being sentenced to death?