I believe in ridding society of heinous and evil individuals. I don't care if it's not the worst punishment, I don't care if it costs more to do, I don't care if it violates some religious belief in sanctity of life. I think we have a moral obligation as human beings to police our own and eliminate these people from our midst.
That said, I am an advocate of the death penalty in only the most extreme and obvious cases. If there is any doubt whatsoever, or if there are tenuous circumstances, I do not favor the death penalty for this crime. I think I have a fairly 'moderate' opinion on this, compared to those who want to nail peckers to the floor and shit. I can be more rational and understand there are always individual differences in all cases, and I think it depends on the circumstances, as to what is a just punishment.
Getting to live out the rest of your life, regardless of whether it is in a prison, is not more adequate punishment than death. And I'll tell you what happens to child rapists, they have the prison place them in solitary confinement if their safety is threatened, and they enjoy the many liberal-provided amenities our tax dollars pay for, that's what.