As much as I have zero tolerance for child molesters, I do understand that they are sick people, who cannot be cured. As such, torture and less than humane methods of execution are not called for. A simple bullet to the back of the head would be sufficient. I am pro death penalty, and pro harsh and severe sentencing, don't get me wrong, I believe in hard time, hard labor, and no privileges as well. But mentally sick people, as in the criminally insane, should be executed in the same manner as any other criminal, quickly and efficiently.
As an aside, by the way, when the Constitution was written, the men who wrote it, and included the clauses that forbid cruel and unusual punishment, were using hanging and the firing squad as methods of execution. They did not consider hanging or the firing squad to be either cruel or unusual. Therefore either of those methods are quite acceptable. So, lethal injection should not be considered cruel and unusual, by any stretch, since they anesthetize a subject before they stop the heart and lungs. In fact, any method of lethal injection would be far more kind than they deserve. Go back to shooting them and hanging them, it works. Most of their victims suffered worse.