I don't think death is alway necessary, but I think it should be an option. If you consider how rapists are usually repeat offenders, a death sentence could have a dimunitive/prohibitive effect, as well as a retributive effect.
The option of death for rape in the above situation exists in three-strikes laws, which are problematic for a number of reasons. If by "dimunitive/prohibitive" effect, you're talking about a deterrent effect, the death penalty for murder doesn't even accomplish that.
I meant repeat RAPE offenders. By taking the life of a bona fide rapist, you are diminishing (in this case, altogether eradicating) the capacity of that individual to rape, which would be a diminutive/prohibitive effect.
I suppose life w/o parole would achieve the same end.
I'm not trying to wax all philosphical, but hearing about rape gets my blood boiling. I understand it's not good for me to think so retributively, but I'm just trying to talk it out.
personally i don't support the death penalty under any circumstance. it's a costly means of revenge and not justice. repeat rapists need to be put away for life with no chance of parole. i also find it very bothersome that these people get away with lighter sentences than others or get released on parole only to commit the same crime again.