All it will do, IMHO, is give sex offenders a reason to actually kill those whom they commit the offense against, in order to try and limit their chances of being caught. Cause heck, if they're going to hang anyways, might as well try to not get caught.
The SCOTUS in Coker v. Georgia said as much. A rapist who does not take the life of his victim should not receive a more severe sentence than a deliberate killer. Want to lock the scum away in prison for the rest of his life? Fine by me.
Go ahead and flame away, I've already heard it all.
"how will Capital Punishment for sex offenders curb any crime at all?"
I dont care if it does. If someone rapes and kills your son, I'd rather not pay their living expenses.
What punishment would be acceptable for such an act? Remember this is your child, not someone elses.