Rapists and pedophiles - what punishment is reasonable?

From the side that says
'no death penalty under any circumstances' and
'people should be imprisoned only if their crimes are egregious' and
'prisoners can always be retrained and should be integrated into society'
TO
'death penalty whenever possible - an eye for an eye and a tooth for a
tooth is the way it should be' and
'three strikes and you're in jail for 30 years' and
'jail is where you should stay for your entire sentence - and a little
more if possible',
every one has an opinion on this.

But in the case of pedophiles (proven beyond a shadow of a doubt) and rapists (again, proven beyond a shadow of doubt) I think the norm should be universal capital punishment.

But what you have outlined as the punishment below seems reasonable - as long as the scientists claiming that it works are willing to face capital punishment when it doesn't work.

Sai

P.S. I am also willing to consider the hanging of the criminals by their ... until they die. It seems to be reasonable to expect the criminal to feel at least a femto-amount of the pain that the victims have felt.

P.P.S Please note 'beyond the shadow of a doubt' is not a legal definition. But then 'beyond a reasonable doubt' is not well defined either. What is reasonable to one could be unreasonable to another.